WHAT SHOULD I DO 😣

I am 16 years old and I am in a relationship with someone who's 19 and I may be pregnant but I feel like the child won't be his.... I did not cheat I was raped. He doesn't know that I was raped because we were on bad terms when it happened ... and I'm scared to tell him because I feel like he'd Blame me. we got in an bad argument and the next day I went to one of my male friends house and my interest was just to talk and smoke because we were real cool and I was kind of sad because I thought I was going to loose my bf but he was interested in something else i tried to push him off of me but he pinned me down and told me this would get my mind off of him and I even said it verbally "stop" but I don't thing that my bf would understand and would Blame me for going over there in the first place idk if I should get tested or anything for any diseases and If I have a child I'd it's my bf ( I Tried Not To Make It So Long But I'm Feeling Guilty For Not Telling My Bf)