question: hi my name is jenny i have acute sciatic in my lower back and in my right leg shooting pain down my right leg and numbness and pins and needles in my toes . iam on pain killers for the last 4 days and no improvment and sleeping is impossible as i am in so much pain and have heat patches on my lower back .is their anything you can recomand to stop the pain as i dont think i can put up with it much longer  . do you know how long this  pain will go on for . is a MRI scan a necessery