Strange Bunny Behavior

Daisy is almost a year old now, and lately she started to bite at the bars of her cage and shake as hard as she could. With her doing this, I got nearly no sleep last night. So I decided to make her a play area in the next room. And shes been exploring it and likes to go under the bed. But when she does this, she makes a sighing/honking noise and thumps under the bed. What could this possibly mean?

It depends on the noise - my bunny will grunt and think of I get on her nerves e.g. when I sweep up the hay that she liked having all over the floor...
she will also make little grunts and snorts when exploring a new area, think it’s just because she is trying to sniff everything at once!
Definitely if she is thumping she is either annoyed or wants your attention - does anything happen before/after that light give an indication as to what she is thinking?