I Have Sever Sciatica Am Taking Meds But Are Not

I have sever sciatica am taking meds but are not helping to much and am going to pain management starting this Friday what I need is an mri with die so the doctor can see the damage from my hips legs and feet I have been suffering for many years and am at the point where some days I cant hardly walk like after a long day at work its very hard for me to move about but I have to make myself move because of my job wich is very labor intensive ,so how can you help me get relief from this nightmare of pain