If you are really worried about it, get your sandwich toasted and that should cook out all of the things that make cold cuts bad for pregnancy
I've been eating a lot of jersey Mikes which to me is better than subway but pretty much the same thing. I eat the sandwiches cold. My doctor said it really wasn't that big of a concern but a lot of people will argue it for many reasons. Third baby though and all healthy
I have been the exact same i get it most days , its a healthy option and eating the toasted bread is good for sickness :) x