He works with his Ex

Hey ladies so I’m writing this for genuine advice…

My boyfriend and I have been together a little over a year now. And we have a really great relationship, truly. But lately some things have bothered me a little more than usual. Let me preface this by saying I have Generalized Anxiety Disorder and am on medication and going to therapy for it. That’s why I’m not sure if this is just me overthinking or if I should have a genuine concern. About 7 months into our relationship he decided to tell me (kinda out of the blue) that he dated this girl he is on a team with. He assured me that there was nothing to worry about since she married another mutual friend on their team. I don’t know if during this time that they dated they were sexually intimate with one another so I can only assume.

Some additional context is that during this time I also was sitting next to him while he was on instagram and noticed he looked up 3 of his exes. I ended up saying how I dislike that and find it disrespectful. If he was really over them the way he claims to be then I don’t see a reason to be looking them up. Also one of his exes he looked up had a public account and posted and lot of lingerie pictures (which he liked while we were together). After explaining this to him he agreed he wouldn’t do it again, and it happened two other times where I saw his exes accounts in his search history. I was again assured by him there was nothing to worry about. And since those two other occurrences I haven’t seen anything else in his history (but who knows if he’s just deleting it now)

Fast forward to today, this ex that he works with I’m obviously trying to be mature about. Telling myself that it’s a professional situation, she’s married, and my boyfriend is with me. Despite these reassurances I tell myself, my insecurity and anxiety got the best of me and I snooped on his phone. I noticed he muted the conversation from this girl. Most of the messages have been primarily work related with a picture of her dogs sent now and again. However she was out on maternity leave for a while and is just coming back to the office today. She ended up sending him a text asking him to wait for her because “it was like the first day of school and needed someone to walk her in” and then she asked him if he wanted a coffee because she was stopping on the way there. To which he replied you don’t need to stop there’s a Starbucks at the office. After seeing these texts yesterday I think he got suspicious and knew. So this morning I woke up to all of their messages erased.

Anyways I know I’m wrong for snooping so please don’t come at me for that. I know I have anxiety and that’s something I’m working really hard on. But I just can’t help but feel on edge about it all since I was given a reason not to trust his word… I don’t know ladies am I crazy and overthinking it all? Or should I talk to him about it again?