have you had any luck in finding out what is going on. I had an epidural post op pca pump and since have been having tremors, jerking and cramping in my right leg. It will feel like pressure builds up in my spine then after sharp intense pain across my back, my leg goes crazy. It is just effecting my quad muscles and my hamstring. the hamstring will cramp up and twist my leg around from toes to hip.

God be with you and hope you are doing better by now