27 F and 29 M am I dealing with a false memory in my relationship?

Ok so I have always been loyal in my relationships. I don’t message other men. I don’t have male friends (I just don’t not saying that’s wrong) and I don’t message other guys on social media. I have messaged some of my husbands friends before but very rarely.

Well I was at target with my husband and we were checking out and I saw this guy I went to school with as well. My only thoughts were oh that’s Austen from school I haven’t seen him in a while. I mean whatever you know. I have never been romantically involved with him. Well we were walking out of the store and he was walking in front of us and I got a random memory flash of a social media post he posted one time and I messaged him about it and we had a one off normal convo. Well I was kind of caught off guard by this memory as I had never thought of it. Well I tried to figure out when it was and it popped up a memory of maybe me doing this the first year of my current relationship. This majorly caught me off guard because I have never even thought of this or this person my entire relationship. Even seeing them at first I didn’t event think of this.

The thing is, I am now 99% certain this was before my relationship but now this random “memory” has made me question it. Like I can remember a memory of this prior to my relationship.

I kind of don’t know what to do. It would have been really out of my character to do this and just forget about it for 4 years. Not likely. But I can’t get past this random memory.

Look I know it’s not cheating but I just don’t message other guys. I feel like if I did I would be able to remember this better and it wouldn’t have thrown me off like I did what?

Don’t just say you know you can talk to other people right? It’s not that. It’s about I know deep down I would have remembered this before now and it’s really throwing me off. I am not the type to forget stuff like this.