Those pains usually have to go for acupuncture. Western doctors will not give any conclusion. Worst still they even ask you to do x-ray here and there. Prescribe don't know what kind of drugs.
You must have faith. Acupuncture 1x is not enough. The most about 6-12 times depends on how fast you recovered.
I had en epidural for labouring my second one about 4 yrs ago. 3 months after the birth, I started to have pain especially the back spinal cord. Especially driving when turning my head left or right, wah....so painful. So I decided to go for acupuncture, my session was 12x (1 1/2 mths). Recovered totally since then....no more pain.
Had problem with epidural. I had some numbness side effects aft childbirth on my lleft eg and it lasted a few months. Scary.