Am I over reacting?

I just want to know how others would feel or do.! I can’t get it out of my head. So sometime in April I came across my fella leaving comings on ladies TikTok calling them beautiful and real life beauty that kind of thing. (Not that he complements me 12 years together 6 kids) I was heavily pregnant when I found out and I was in an out of hospital around that time too with high blood pressure I found a few more from around March the weekend before I ended up in hospital again and had to be induced because I was so poorly and so was my baby.! so what I’m trying to say is I’m finding it so hard to let it go it’s just alway eating me up. I feel like I blame him for me and the baby being in hospital. He says he’s sorry and it didn’t mean nothing but why do it then.! He’s since deleted he’s TikTok too. I’m trying my best just to move on but it’s always there I don’t feel good enough now. Please tell me what you would do and I hope this long post makes since.💞Picture of my boy when he was born