What you describe sounds like Sciatica. I had the exact same symptoms and it can be really painful and annoying. I couldn't find a single position to relieve the pain. Then, one day, it just up and disappeared. I still feel it a little, but nothing like it was.
Hope you feel better...
It was done on my tummy and liver. They did find in the first scan something called capillary hemangioma in my Liver, but the MRI was normal. I have no idea what the causing this pain and at times the pain shoots down into my leg.
what part of your body did you have the MRI done?
michelle