Foot Numbness/pain...please Help!

Hi, I am new to this site and have a question. About a year ago I was severly injured and ended up with two large herniated diskd, one at l4, s1 and l5 or something like that I would have to get the papers to know exactly. I know I have a pinched nerve and my spinal cord is also pinched by these disks.

I dont have insurance and can't afford surgery so I see a doctor monthly and she helps control the pain. With these herniated disks comes lots of leg pain and sharp pain down my left leg from my buttox to under my knee and it stops there. Also I get cramps in my upper left butcheck.

Now just recently only happens in my sleep I wake up in the middle of the night 3-4 times with severe pain in the heal of my feet. It feels like a million needles pricking the bottom of my heal. This is extreamly painful, just as bad as the sharp leg pain if not worse.

My question is. Does anyone know what is causeing my foot numbness/pain. Should I go see my doctor immediatly about it. Or what should I do. Its causeing my lack of sleep and a ton of pain and getting worse and worse every night usually its when I sleep. I just dont want to wake up and not be able to move my legs or feet. Any help or advice would be greatly appreciated.

Shawn