I’m going thru a lot

Recently I’ve remembered something tragic that happened to me in 4th grade. I’m 18 now and a freshman in college. I’m not sure what happened to make me remember but now I can’t seem to stop thinking about it. Basically when I was in 4th grade I sat next to this boy and I can’t recall when it started but I remember at some point he started forcing his hands down my pants and fingering me. As I think more about it the more I remember. I told my mom and made it seem like it’s affecting me less then it actually is. She filled in some blanks and remembered me saying that the kid next to me was pinching me. Which made me remember that he told me not to remember. We got my seat moved but it didn’t stop he kept saying to meet him in the bathroom and I kept missing days so I wouldn’t have to go at the time I didn’t know I could say no. After remembering I have been piecing stuff together such as when I lost my virginity I freaked out and broke up with the guy. I feel like I’m overreacting since this happened so long ago but I feel like this just happened and I’m not sure how to move past it. If anyone can help I’m working on getting a therapist but is there anything else??