I think Peanut has it!

I have noticed him lifting his back right leg up sometimes.. when he is walking.. Never running. I tried to hold his leg and put pressure to see if it hurts him but he doesnt make a sound. I am going to have to take him in and get an xray but I have to wait a week for my check! I am so scared!! I have noticed him do it a long time ago and he stopped and now I am seeing it more.
Does any of you have exp with this? Please help... Is their more signs that he would have it for sure??