My partner is watching porn

I understand that watching porn isn’t necessarily a bad thing, but I never thought my partner was someone who did. Before we were ever together we both watched porn, but I stopped shortly after our relationship began. Like a week ago we were driving home and I don’t remember how it came up in conversation, but he said “when I watch porn I don’t really care what the title is, if the image has something I want then I’ll click on it”. When I heard him say that my stomach just dropped, I was so upset by that. Recently he hasn’t had as much interest in sex (we’ve had a few pregnancy scares and that’s always been a huge anxiety trigger for him given we’re still in college) and the fact that he’s getting off watching other women having sex makes me feel like absolute shit. I know it’s his anxiety getting in the way, however, I can’t help but feel like I’m not enough. I was his first partner, but he wasn’t mine. It scares me that now he might be regretting not having been with other women. I want to talk to him about how it makes me feel when he watches porn, but I’m worried it’ll start a fight and that he’ll keep doing it anyway. Is it bad that when he says he still watches porn it feels like he’s somehow cheating? What should I do in this situation?