Thank all of you for your responses. He's always putting off his doctor appointments til later and it makes me nervous. I get even more nervous when he goes to get MRI's and EEG's done, and especially waiting for the results afterward. I don't like going to his appointments and worrying about the results, but I like putting them off even less. I think I'll try harder to encourage him to attend them from now on. It's not worth something bad happening.

I think you are right. I shouldn't worry as long as he gets regular checkups. It's hard to fight the fear though.