Hi Terri! Welcome to the MS board. I wasn't diagnosed with PN but I was misdiagnosed with many other things over the years. It took about 17 years for me to get the correct dx.
I had an Mri way back in the early '90s and was told I did not have MS then. Many of us here have had problems with getting a dx.
Good luck

. I really hope you don't get an MS dx.