That's hard. Memories aren't just based off things that happened but the emotions you felt. My ex sent a photo of me at the beach, with some happy caption of how it was a great time.... ummm, not really. I felt out of place, him and his friends walked along the beach to smoke weed while I watched his friends baby bc I was the mom of the group (I was literally a mom lol)... but he doesnt remember it like that bc of his emotions based off that day.

Something that might help you is journal it. You can refer back to those times and see if your memory changed a bit through the months/ years. It sucks having those issues. I have no real memories of my being young and I'm always afraid it'll effect my "recent" (20 years worth) memories.