Piper went through a weird phase of sort of false pregnancy after her spay, she tried to make a nest by plucking her fur out, and was very moody. We would distract her with treats when she was getting too focussed on it (because we were used to stopping hens' broodiness) and it resolved after a few weeks (I guess when she didn't have babies she realised it was all for nought!)
Is there anything that is particularly concerning you? Also your bunny is very cute