Abby, This is only my opinion and you need to do what's right for you but I have to say this.

I think you need to back the cart and the horse way back. First, you are not definitively certain you have MG, right? Everything points in that direction but what if you don't have it? If you are on Pred, and Mestinon, when you redo the SFEMG, there is NO WAY you will know for sure. Pred will make any signs of MG disappear. Talk to anyone who has had a test on it and then off of it.

Yes, you are having significant difficulty with balance. Has anyone looked at your hips or lower back to make certain it is muscular and not some other cause? What if you have something else adding to that issue?

Prednisone is a HUGE decision. You need to write down all of the possible implications and/or side effects of it. That alone should take a month.

Can you adapt your life for a month, find out exactly ALL of what is going on and then make your decision? There's often no going back with Pred. Getting off of Pred is not easy and there are people I know who can't get off of it due to what it's done to their adrenal glands.

If you're not near a crisis and overall doing okay, wouldn't it be better to wait for now at least? Again, this is only my opinion. I know Pred is very helpful for a lot of autoimmune diseases but please consider being cautious.

I hope you can have answers about your health you can feel good about.

Annie