She was spayed at the very start of January. She changed straight away in that she stopped spraying me and trying to hump things but her behaviour is still bad
It's not that her behaviour is bad, she's just being a bunny
Rabbits don't 'come into season' they are induced ovulators.
Rabbits are prey creatures, so don't particularly enjoy being picked up, so be aware of that.
How are you approaching her?
Rabbits after often 'hands off' bunnies. I have one here myself, he hates being held, touched or examined, he will kick, scratch and struggle and feels very unsafe if not having 4 feet on the ground.
Your best bet is to sit on the floor with her, in her territory, sit and read a book, or sit on a laptop or something and let her come and explore you, put yourself in her shoes, how would you feel if someone kept trying to pick you up who was ~10-15 times larger than you, from above, where the rabbit would normally exprect predators to come from.
You need to gain her trust