Could The Swelling In The Spine Around The Surgical Area Be Causing Pain In The Hip?

I had decompression surgery last October, and even though I was told I was told I would be in and out of hospital in three days, I ended up not being able to stand right after surgery. I was sent to physio therapy for 5 days, and was able to go home with a walker. It took six weeks before I was free to stand and walk on my own. Two months later, after returning from the bathroom,I got a horrible pain in the sacrum area. The surgery was done on L-4,L-5 area, and they felt after a CT scan and an MRI that I had a pinched muscle in the hip area. That was just before Christmas, and I ended up once again in Rehab for 5 days. The pain has gotten better, but now I am getting a burning in my left hip radiating down into my knee. Could I still have swelling along the spine in the surgical area that could be causing this. They did see a disc that had fluid around it on my MRI.