Help! Ate expired mayo!!!

I made a grilled cheese earlier today with mayo instead of butter, only for my husband to realize it's been expired since 09/17!!! I hardly ever use mayo and it's the kind with pasteurized eggs. I've read that the shelf stable kind of mayo is good for 3-4 months after the best by date but this is like 8 months! I'm sorry worried I'm going to get something that will hurt the baby now.

Hopefully heating it up in the pan will have killed anything harmful???? Ugh I'm a nervous wreck now, sorry...ftm.