My brother molested me when i was 7?

Jordan • Im 11. Bye creepy people.
When i was 6-8 my brother did bad things such as: hiding under my bed when i got dressed, showing me his area, pulling my pants down, taking pics of me naked, and making me suck his.... Oh god.... And my neice who is the same age came over and he did the same stuff. I feel dirty. I feel uncomfortable around him. I am 11 and he doesn't do it anymore. I still feel weird. I never told anyone except my neice and she feels bad and guilty too. I cant tell on him beacuse hes super smart and has a gf and is good at like every sport. But he scared me for life. I am always afraid someone is looking at my chest. Yes im developed. I have my period. If he were to do this again would i get pregnant, or do we have to have sex? Should i tell? Does this count as sexual abuse? Do i need therapy?