I had 2 herniated disks in my c-spine and I couldn't sleep BEFORE getting the injections. Had to take hillbilly junk for a while, it was bad. Literally just woke up one morning and out of the blue - couldn't get out of bed
I ended up having 3 steroid epidurals. The first two only provided relief for a day or so. The second one was so tedious and painful that I'm surprised I went in for the third. Fortunately, it worked like a charm and I've been good for about 10 years now. Haven't had any problems sleeping - at least due to back problems anyway.
Good luck with your recovery.