Owie!

OK, so back in August, I was practicing a pole split and was really excited at my progress. I asked one of my classmates to take a picture for me, and while I was holding the pose, suddenly I heard what sounded like fabric ripping and searing pain in the back of my leg! I thought for sure I had ripped a muscle, but nothing ever discolored or mis-shaped/swelled. I could still walk, but it definitely felt like a strain or pull. So here I am 3 months later, and I'm up at 3 am because the pain is keeping me up at night. I can't lie on that side of my body, I can't sit for extended periods (car trips are brutal!), and I have lost all range of motion in that leg. I haven't gone to a Dr because I just hoped it would heal, thinking it was muscular. Some days its not bad at all, but other days it brings tears to my eyes. Anyone have any ideas?