Am I overthinking!?

So last night as usual I was on my fiancés phone just browsing (we both trust each other) but I went to go search something and he had left his recent search up which was “How to delete Instagram Messages off a IPhone” because he recently just switched to a iPhone. I wouldn’t like to think that he is cheating or assume that there’s another girl... but what could he possibly want to delete.... What do you girls think? How would you react?