Wow! Sorry to hear of your misery. I wish I could offer you some advice but your symptoms are fairly different than mine.
I am up right now due to being in significant pain and unable to sleep. I have ruptured at L4-5 twice now and had 2 microdiscetomies. I am still having fairly severe nerve pain in my right leg, but mine runs from my lower back all the way down my entire leg pretty much to my toes. Your pain pattern is quite different so I wouldn't know what to suggest might be causing that. Have you had an MRI?
I wish you the best in determining the cause and finding a workable solution. I have been in search of a solution for almost 17 months now and am really no closer than I was back then. Only difference is now, I am a year out from my second surgery, so I can seek out other Doctor's opinions on my own whereas before no one would touch me because I was within that year's surgical window, so I was technically still under 'that' surgeon's care.
Best of Luck finding a diagnosis and treatment. I'll be curious to hear what it is. Take care.