I feel like I made up my assault, is it possible?

from what I remember I was assaulted from the age of 7 to 8 by my classmate who I remember the name of but don’t remember his appearance at all. I have very clear memories of some things and very fuzzy memories of others. I mentioned it to my brother who was in the same program as me when it was going on and he was very vague is answering when I said he assaulted me.

the only thing is I only remembered one incident for most of my life and recently as I’ve been getting extreme counseling more has come up. I have this fear that I might have made it up and just don’t know it? i have ptsd symptoms from it so I’m not sure if that’s possible but I’m just terrified that’s the case and could really use some advice?

thanks for reading