Feeling unsure

Okay so my husband and I have been together 9 years we have 2 children and I’m currently pregnant with baby number 3 38 weeks to be exact. Well the other day i had his phone and was looking in his notes to see if he had one of our account passwords and seen a file keep out, of course I didn’t keep out I opened it up and it had pictures of a bunch of naked women in it some of my pictures I’ve sent him but others as well. I don’t think they were sent to him personally they look like porn stars honestly but I’m still upset about it. Do I bring it up or let it go? It’s made me so insecure I’m honestly so upset by it. What’s your advice?