You have my empathy, 3 years ago I had a bulging disc [despite medical training I had never hears of it before], cut a long story short we went to the bike show at Earls Court, As we walked from the tube station the pain began to worsen, I literally shuffled across the main road and ground to a halt between the road and Earls Court. I could not move, any attempt to do so was akin to being zapped by thousands of volts from my lower back downwards. I felt ridiculous and embarrassed at the same time, people swarmed around me like a river around a rocky obstruction, some asked if I was ok, like an idiot my pride made me say yes I'm fine. I won't bore you with the rest, the only positive was the doctor said this usually only occurs with younger people, can't think what he was trying to say!
Anyway when it goes away, continue to exercise your back, something not many of us do enough.
Get well soon, you will, it's just so damn frustrating, have patience.