I Had Spinal Fusion Of The L4-l5 And Disc Replacement

I had spinal fusion of the l4-l5 and disc replacement of l4-l5, l5-s1. I formed so much scar tissue that I have become disabled. I am getting my second round of an epidural steroid injection next week. I would like to know if there are any flying restrictions. I am scheduled to fly three and a half weeks after my procedure, will I be able to make that flight or are there restrictions after an epidural?