I never had a MRI pregnant but I had a chest x-ray and DD was fine. I think an x-ray is worse because of the radiation.
I just read about another lady on this board that had an MRI done on her actual fetus because they suspected a brain abnormality. I'm guessing that if they are willing to actually aim one at the fetus they can't think it is that dangerous.
I hope they find a solution for your pain. I had intense gallbladder pain through most of my first pregnancy and it was terrible. I wish I had the power to make no one have to suffer pregnancy pain.
Alanna is Mama to DD Sequoia (8/8/07), DS Callum (12/12/12) DKitties Syd & Emily (4/4/03)