Fiancé seeing escorts

I’m very concerned my fiancé is seeing escorts. Is there advice any ladies could give me to confirm this? Maybe some things to look for that I haven’t thought of. Our wedding is in 7 weeks. I’m so concerned.

I know he has had kinda a fetish for it but thought it was something we only talked about.

A few things other than just my intuition: his camera roll in may I found a pic of his ID and then 2 (old) selfies. Sex had felt different between us.