Relationship Anxiety

This may be the dumbest thing I have ever worried about but I can’t stop thinking about it. Seeking some answers.

Background: I have been married to my husband for 2.5 years. We started officially dating in Dec 2019. I am a 28 F and he is 30 M.

No infidelity from either one of us. However, I have major trust issues from previous relationship. I have had to work on those throughout the years. I would get paranoid about my boyfriend/husband doing something like messaging other girls even though he wasn’t. I used to be a major control freak and have since gotten much better about this because it’s not worth worrying about a what if.

I also do have some anxiety, usually can manage this my own but have had a few bad episodes of anxiety in the past.

So here’s my dilemma:

I have never once cheated on my husband, not physically or emotionally. I saw this guy at our local gym a few weeks ago and I used to go to high school with him. Seeing him made me remember one time I sent him a message on social media about a meal prep he posted. This person is major into fitness and I asked about the meal prep and from what I remember a light conversation about fitness and eating right. There was no flirting, nothing. I have never been romantically involved with this person in my past. Never have had romantic feelings toward this person. I just saw their post and asked about it. The problem is, I can’t remember when I did this. It was so long ago, perhaps 6+ years ago. But then my brain was like “oh what if you sent that after you started dating your boyfriend” and I kind of just freaked out from there because now I can’t remember when I did it. I don’t have some of my social media accounts any more so I can’t really fact check it. But like I said it was a purely platonic conversation. Because of my trust issues, I feel like oh if I didn’t tell my husband I commented on another guys post(even though it was a platonic conversation) then I hid something. Even though it was nothing and the fact that I can’t remember it means it wasn’t significant.

My husband has messaged another girl in the past on social media when we were dating about a puppy she posted asking where the puppy was and how much. We were looking for a dog at that time. That’s not a big deal.

I don’t understand why my brain is so caught up with trying to remember when this happened. Because the situation itself isn’t bad. I stressed over this and even talked to my husband about it. He literally told me that is nothing to worry about because that is not crossing the line. It’s like asking someone how they are doing? He said he didn’t care if it did happen after we were dating and it’s fine. I actually felt better after that for 2 weeks then my anxiety kicked up and I am stressing now even worse over it. It’s like I feel like if I didn’t tell him every interaction I am hiding something even if it’s nothing bad. He’s not even controlling like that. I am just looking for help, I feel like I am majorly overreacting. This is a what if, it could have been before my now husband but I just can’t remember.

I love my husband and have never done anything to hurt him. The fact I can’t remember this brings me distress and makes me feel guilty even though I know in my heart and soul I have never done anything to hurt or betray him. I think it stems from my own anxiety and trust issues and how I used to be very controlling with him because I was so worried from my past

Tl;dr
Basically can’t remember when I sent this guy I know a message, the conversation was purely platonic. I can’t remember if it was before I met my husband or not. Stressing that I can’t remember the date. Need reassurance that this is no big deal and that I did no wrong to my husband if I sent this message after we started dating.