epidural pain???

OKAY. I'm 4months PP, I did end up getting the epidural after not wanting it. Two weeks ago, I had a pain in my spine about 2inches around where my epidural went in, a few days later, a huge knot on my spine, next few days, another not. Starting yesterday when I woke up, my back has been hurting SO bad! I can't breathe, laugh or even turn to look behind me. Hurts to put on my seat belt. Anyone else have this or know what it is??? I have a dr apt on Monday!