[HELPPP] Shes Thumping and grunting at me

Hi everyone! Im sorry for my English, im not a English native speaker. Here we goes:
I adopt a female lion bunny and she must be around 4/3 months old (cant tell cause the family where she comes from couldn't tell me). I got her a few 2/3 months ago and she lives with me at my apartment as a free runner bunny. Everything was peace and bonding since a few days ago when she change her behaviour... One day i notice she circle me and chase me, and when i was sitting in my couch or a chair she grunt around me. The worst part is when im lying down in my bed, she goes under and start thumping very loud while grunt, and then run around and climb on the bed. Since she pee on my bed a lot of times i dont let her be in my bed, so i move her until she goes down, but this only intensifies the thumping and grunting and she keeps trying to stay in the bed. Cause in this conditions is impossible to sleep, i had to close my room door and ban her to stay here while i try to sleep. But i can hear all night super super loud thumps and she digging the door.
In any moment she tries to bite me or charge at me. She only refuses leave the bed or wherever i am.
Google cant tell me whats going on cause some websites says is a dominance/aggressive behaviours, another says shes scare, another says she wants attention, and etc.
It looks likes she being dominance or super demanding at me. Is really expensive clean a mattress so i would like teach her not go on my bed without her threatening to kill me hahaha.
Also it seems it might be time to neutered.
Any ideas or opinions

Sounds like hormones. She's at that age. The teenage stage where they are moody and get sexually frustrated. So you will either need to find a knowledgeable rabbit vet to spay her, or if you don't have one in your country then you will probably just need to wait it out until she matures. This can take months though. And you may need to make some living changes, like giving her a base that is just hers to rest and eat in. She may be feeling some territorial insecurity and that is why she is thumping and grunting, along with it also being hormonal.

She was just a baby so was nice to you, now at 4 months she becomes a teenager and will keep marking her territory and letting you know you are not allowed in her turf, that's what is most likely happening now. If you want her to stop peeing all around and all you should contact your vet about neutering (spaying) her. It is expensive but your mattress maybe is more expensive. After neutering she will still be hormonal and territorial up to 4 more weeks, then she should calm down and you can train her to use her litterbox.

Also if you are patient enough, after 1 year she can become calmer, but no guarantee. I have a girl with the same problems plus she was biting until she was 1 year old, now she is 2 years old and she adores her tiny toilet she won't pee anywhere outside of it but she is still boxing at me if I enter her space, but she gets better and better as she gets older. She is not neutered. But that cost me lots of blood and lots of training, neutering her would make my life much easier to be honest.

I agree with the above posts. Get her spayed if at all possible. The maternal instinct and all that goes with it is VERY strong in rabbits and an unspayed female, in nearly all instances, will be territorial and out of sorts unless she's spayed or raising a family. It's what nature built into them and there is no way to train them to be other than what they are. A spayed/neutered rabbit is going to be happier, because it's not always trying to get what it cannot have.

Cloverhouse said:

I agree with the above posts. Get her spayed if at all possible. The maternal instinct and all that goes with it is VERY strong in rabbits and an unspayed female, in nearly all instances, will be territorial and out of sorts unless she's spayed or raising a family. It's what nature built into them and there is no way to train them to be other than what they are. A spayed/neutered rabbit is going to be happier, because it's not always trying to get what it cannot have.

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I generally agree that getting her neutered makes her easier to rule for her owner, but can't agree that neutered rabbits are happier than intact. But agree with that if you want to keep her intact it is very unfair to her do not let her have kits, because I agree that their maternal instincts are very strong and the amount of love and knowledge they transfer to their kits is truly amazing, I doubt that neutered female can be happier without all of that but agree that getting her spayed makes life of her owners much easier.

Also, letting her have her litter say once a year is not for everyone, it is lots of hassle and taking lots of time and you have to learn a lot, otherwise you can lose the babies or / and your bun, if all kits survive you will have to find new reliable homes for them very quickly and it's not as easy as it looks at first, and it is not profitable at all since it involves lots of hard work and takes your time and focus, also feeding her and her kits properly during her pregnancy and nursing (about 3 months in total) gets really expensive, so I wouldn't encourage that for a regular pet rabbit owner, just too much hassle and extra money and risk of losing babies/mother because of your lack of experience. So neutering will make your life easier and she will never know what she loses so she will be happy and obedient.