Hi Lynn, This sounds exactly what's happening to me! I'm 56 & had left THR 6 weeks ago. I was walking fine without cane & feeling great but 2 weeks ago after doing some shopping, I had such severe pain I couldn't walk or move without excruciating pain from my thigh down to my knee. It seemed to feel better after I rested it for a few days, but by the afternoon I can barley get up or down to seated position, let alone walk unassisted. I had my 6 week appt. & x-ray yesterday & surgeon saw nothing & didn't really tell me anything it could be at all. Now I'm scared! I was(am) very active & this is very depressing! I have had no PT & am on nothing but Advil for pain. My replacement is uncemented & done posterior. I'm wondering if the peg is loose or???? I was hoping that it would feel better once the bone grows in but now (after 2 weeks of this pain) & having my Dr. say he sees no problem, I'm really worried,