It sounds a lot like hormonal behavior to me. You can, like Ivy said, check if she's not hurt by gently examining and palpating her - it's always useful to get the rabbit used to being examined anyway. If she reacts badly or shows any sign of pain, of course go to the vet. But at 4 months, the hormones is the most likely answer. Running around your feet is very typical too (as is biting, peeing everywhere, grunting, being territorial and an all around pest). Rabbits react differently to the arrival of maturity, my youngest rabbit was the worst teenager I've ever had. I felt like killing him about 30 times a day from the day he turned 3 months old until he was neutered. 24h after the operation, he was already a changed bunny. I could have married the vet. ^^
So if she's not hurt... you'll have to grin and bear it for a few weeks before getting her spayed. Get a vet knowledgable about rabbits to do it and it should help a lot.