Not sure how it happened, but luna was sitting on the couch the other day and she stood up to change positions and she started to yelp, and she would not put pressure down on her leg. After awhile she seemed ok and even started to play. Today she tried to get in and out of the bath tub, and she must of tweaked again cause she started to yelp again something fierce. We held her and calmed her down and gave her a 1/4 baby asprin and after sometime again she began to walk on it act her self. Should i be worried? does any one have any ideas whats going on. I dont want to have to take her to emergency cause that can cost an arm and a leg and the vet wont be open till wednesday because of the holidays. Any help i can get would be great appriciated.