Hi ~ I'm so sorry you're having so much trouble. I don't like the sounds of that foot drop!

I would have thought that would have been taken care of by surgery -- but stranger things have happened.
if i were you, I'd ask my doc to order another MRI with and without contrast material and then refer me out to a DIFFERENT neurosurgeon than the one who did your surgery. (you don't want to go back there!! ) Get an opinion from another surgeon and see what he has to say about your still having the foot drop, plus sciatica. You don't want the sciatica to go on too long or you'll end up like me -- after 2 surgeries, I ended up with permanent sciatica and i've had it now for 26 years!!! It HURTS like #$%%^$ !!! Also get a report of the MRI for yourself too. Just ask them to give you a copy of the written report and then come here and let us know what it says. I'll be interested in hearing what it has to say. Also, I'd love to hear what the neurosurgeon has to say too!
Best of luck and hope to hear from you soon. Hugs, Lee