repressed abuse memories

so i’m wondering if it’s possible i have repressed sexual abuse memories. so currently i am a 21 y/o woman. my older brother is 3 years older than me and we used to share a bunkbed. i have been diagnosed with ocd and also suffered from depression when i was a teen. i have this distinct memory when i was about 9-10 of my older brother dry humping me and me being disgusted and asking him what is wrong with him. i remember him just laughing. i recalled this memory about a year ago and ever since i’ve been having nightmares and i can’t be around him anymore. a bit of backstory, my older brother has always been slow and bit of the socially awkward type. when we were children he would be physically abusive and use his strength over me and my younger brother. i can’t be around him anymore without being disgusted and i keep wondering if he ever did something more to me that i can’t remember. all i know is that i feel awful and feel like i’m disgusting.