I wonder if your sciatic nerve is irritated. I was a Psych nurse all my working life doing lots of lifting as it was in the days of NO hoists. We nurses ,whatever area we worked in will always do research on everything. I have been having back problems for about 8yrs now,I'm 65yrs old. From doing my own research and asking my RMT questions I have learned lots about my back. The sciatic nerve comes from the lower back around the hip area and down the groin. I was having trouble lifting either leg to walk without being in pain and feeling like I was lifting a heavy weight in each leg I was also waking with pain in my hip and down the outside of the leg I was sleeping on. This went on for 10 months until I had the nerves ablated at the pain clinic. This was 14mths ago,I have still had some pain but bearable until the last couple of weeks it seams the nerves have grown back so going back to get it redone next week. I wonder if you have irritated the sciatic nerve from either sitting too long or doing too much because you felt good following your surgery.