It depends on what the MRI shows. If it is indeed a problem in the L5-S1 and considering your age, I expect the doctor's to take the most conservative approach. This is of course it isn't a serious issue in the L5-S1 area, which it doesn't sound as if it is.

It sounds like a similar issue I'm having in the same area. I have foot drop in my left foot, severe pain in my back, and unable to bend my big toe. Surgery isn't an option for me, yet. The problem isn't serious enough and due to my age (34) they want to prolong surgery and see if I get better with more conservative approaches.

Right now I had my first epidural injections on Friday and begin PT next Monday. I've found that with back issues doctor's choose surgery as a last resort and only in the most serious cases.