"I emailed him to let him know when I had finished the open MRI and asked what to do next." When did you have the open MRI and e-mail him? If it was only a couple days ago he may not have had time to reply; I wouldn't automatically assume he isn't answering your emails. Maybe the email didn't get to him either; I'd send it again, but only if you sent it Monday or earlier.

It takes a few days to a week before a test gets to the doctor too, he could be waiting to get the results still. I know I have to get tests a week before I go in for my quarterly visits with my doctor.