Dear friend,
I am sorry your rabbit is not feeling well.
If she is not spayed this can be a sign of uterine cancer:
http://www.rabbitnetwork.org/articles/spay.shtml
She can bleed out very quickly so she does need immediate veterinary care.
If she is spayed it may be a urinary tract infection.
In any event she needs to see a vet.
Please let me know how she is doing.
Best wishes for her,
Terri
Animal Healthcare expert
Expert in pet health and behavior. 20 year experience with animals.