Are your symptoms like MG?? Maybe, maybe not. The mind CAN play tricks on you if you are under stress. Did your grandfather have the antibodies -- did he have positive bloodwork? If so, you might want to get the test IF you have good insurance (it is fairly expensive).

Autoimmunes tend to run in families -- but, there are a LOT of autoimmunes. Your grandfather could have MG and you could end up with MS. There are families where more than one member has MG -- but, it is NOT an automatic thing.

Some of us do have trouble closing our eyes. Our legs feel like lead -- very heavy to pick up. I do sometimes have the sensation of a lump in my throat. Have you had any liquid you swallow come back out of your nose?