Terrible back pain

I was doing the squat and abs challenge since june 1st. I lose 9lbs already. I exercise, diet and the challenge. On day 25, ehen i was doing the crunches my back hurts so bad and i coudnt gt up anymore. I'm not sure if its my spine because of epidural ( i gave birth 4 mos ago) or the ehole back. My husband helped me to get up. I was so scared that i cannot walk again or took care of my kids because of that. I stop my challenge at day 25 feeling sorry for myself. ???? I called my ob and she said it might be the epidural. I have to see a chiropractor by next week. Now i feel helpless and cant even jump, squat, bike and even lying in bed hurts my back.