I think I'm going BLIND! Should I switch doctors?

Ok, I have to apologize because I know I’ve probably mentioned several times on this site that I have thyroid disease. But here’s the deal. I’ve had it for over 5 years now and during this time I have switched doctors 3, maybe 4 times. My current physician tells me I don’t need treatment right now because it is inactive – maybe that’s because during my uptake and scan I was burned from the radiation…but that’s a different story. Now, I’m losing vision in my right eye when I wake up in the mornings. I’m terrified!! I’m seeing an Ophthalmologist and she tells me the vision loss is caused by my thyroid, but everything looks fine from my exam and x-rays. However, she is concerned that my PCP hasn’t treated my condition seriously. I am so tired of these changes, but I don’t want to lose my vision. Should I find yet another physician??