Micro cheating? Possible cheater?

So I been married for 2 almost 3 years we lasted as a bf and gf 7 years. We were pretty young and had a kid at a young age. I love this man with all my heart but since we got married things changed quite a lot (the first 6 months we used to live with my parents bc we were struggling with finding a house) once we were able to move out things went out of control. Our fights started to level up. However we went thru it we talked a lot and discussed about our feelings and stuff. Once a few we used to have discussions but they stopped to getting physical or harmful. But I feel I haven’t been the same ever since. It’s like my heart broke to million pieces due to my husband behavior during fights. I still love him but something changed inside me. And I’m pretty sure for him too bc I have hurt him with words as well.

Well like I was saying ever since that discussion we tried not to be so violent and better calm down before we started to speak to each other. Today I was scrolling thru ig and found a “you might know profile” and I saw my husband was following this police lady I’ve never heard of so I clicked on her profile and checked there were no mutual friends but my husband needless to mention that I kinda identify all his friends because of the time we’ve been together . So I get home and I confront him about this chick I wanted to know who se was and why was he following her where did they meet. So I asked him and the first thing he says : “is a coworker from a friend” his friend who we calling Oscar is a police officer (my husband it’s not he is a systems engineer ; therefore he works from home) so I started getting really upset and started yelling stuff like “yeah she’s hit coworker not yours why you even following her if you got nothing to do with her” so he just says “bc shes from here too” to me it sounded like a basic excuse like ok yeah but you don’t even know her (I guess) and well we started fighting he started excusing his ass saying you folllow a lot of male influencers (only 2) and they live in a different city/country plus they are influencers and lemme tell you following influencers was never prohibited in our relationship (he follows influencers too) so then he excused his ass AGAIN by saying “I found her on Tik tok and decided to check her ig profile” and I asked to watch her content and man all I saw was ass pics informs of mirror but showing ass and I get it it’s her profile and she has all the rights to upload whatever the ducks she wants and I’m not even mad a the lady bc I don’t know her