Should i take her to the vet?

My your description, it definitely sounds like she is in some kind of pain. I know that my cat behaved very oddly (in a withdrawn, acting sick kind of way) after a bite at the base of her tail that we hadn't noticed developed an abscess. Bites from other animals can be very hard to see. If she is struggling to jump, are you sure you have checked the backs of her legs? Legs and tails are common bite areas, and sometimes abscesses can form that are not easy to see but are painful and can definitely put your cat out of sorts. Or perhaps her tail is damaged, and she is hesitant to jump because flexing the tail is painful? I would definitely take her into the vet and give him the story, just to be safe.