Please help

Please can someone tell me if this is acceptable or not… me and my boyfriend have a toddler, around a year ago I got a message of a girl I know basically saying at the start of me and my boyfriends relationship he slept with her friend. My boyfriend admitted to it but said it was before we got together... long story short I went on his phone not long after (I knew he went on porn) and I found chaturbate on his browser which he said was a pop up. I was ok with porn but that site seemed a step too far. So we had a big argument etc… anyway this morning I have gone on his phone and he’s gone on TikTok (didn’t even know he had an account) and commented on two lesbians. Then he’s also saved videos on his phone on girls dancing around half naked. Please tell me if this is me being irrational or if this is unacceptable. I’m also pregnant and feel so low right now.