I had two Epidural Shots due to the extreme swelling in my back. I'm walking 60% better but I'm still hunched over. The herinated disc was pressing my nerve. Yesterday my Chiropractor notice the swelling went down but there are two knots in my lower back; one near the herinated disc and the other is near the top of my buttock where I had sciatic pain. Is this common? Should I have the third epidural shot?