Explicit pictures

Is it a normal guy thing to have explicit pictures saved in their photos? First of all I’m not one to snoop through my husband’s phone and in the 9 years of marriage I’ve only done this 2 times. The first time was not intentional as it was his old phone that I thought it had been reset to factory settings and I was trying to activate it for my daughter since hers messed up, but upon looking I realized all of my husbands info was still on it that’s where I first saw a picture of a girl in her bra and underwear on his photos along with tic toc videos. I wasn’t really bothered by the videos but the picture is what got me. I did ask my husband about the picture and he claims that it’s from a group chat that he’s in and that he doesn’t know how or why all the pictures/ videos that are shared in the chat automatically saved into his camera roll. I’m honestly not convinced about that and haven’t been able to move past this explanation. So I did intentionally go through his phone the other morning and didn’t find any evidence of cheating except for more very explicit pictures on his phone. And I’ve just been feeling blah about this whole situation. Im 14 weeks pregnant and have been feeling so insecure about my changing body and seeing these things on his phone makes me feel even more insecure about my age (35) and how I don’t look anything like the young fit girls he’s apparently into. I just feel like I see my husband in a different way bc I never imagined he was fantasizing about other women and I feel a little disrespected and disappointed. Am I overreacting?