I panicked after eating a Subway wrap early on, but my doc said just avoid raw street food. If you really want it, ask them to toast the bread and veggies hot.
My doctor strictly told me to avoid cold salads from outside because of the Listeria bacteria, which can survive in cold temperatures. Always choose hot, fully cooked meals instead.
I totally avoided outside salads during my pregnancy because of infection risks. It's just a few months, better to eat thoroughly washed home-cooked food.