advice please I'm struggling...

Hi, I'm 30 weeks pregnant & when I was around 15 weeks I caught my husband looking at photos of other naked women of the internet (he admitted to pleasing himself to them) I know some women say it's "only porn" but from past personal experiences I'm very against porn (my husband knows that & has always said he's not into it anyway). I'm trying my absolute best to move past it but I just don't look at him the same anymore & it's taking my heart... I don't have the same love & trust I use to have😓 I don't know what to do😢 please help x