Look for doctors who are board-certified in pain medicine or who did a fellowship in something pain-related. By the way, here's how you can tell the difference between an M.D. and D.O. Your back and neck (and often shoulder) pain likely have little or nothing to do with your abnormal MRI
You, your partner and your 2 witnesses must sign the marriage register or civil partnership document.
Yes you have to have your license on your wedding day. The witnesses and officiant sign - and it is an oath. At the very least your marriage could be invalidated, the officiant could get in trouble with his/her church. They could all get in trouble for perjury. Just get the license first.