please help? stressing out over what happened

I honestly just needed to share. Ive been dating this guy for 7 months and found out by my best friend who's best friends with my ex that he's been screwing someone's the entire time we've been together. And I didn't wanna tell him I knew until we were together in person(he happened to be in Minnesota playing hockey when I found out). So the night I found out, I went to this party ended up hooking up with my ex friend with benefits in a hot tub....while that was going on 2 guys(wasted) came out and started to get into the hot tub. Then my fuck buddy left. And I was with those 2 drunk guys. One happened to "need help finding his keys" and we ended up fucking in a shower. The next morning I took Plan B just in case. But some chick texted me asking what happened with the guy in the bathroom. Then informed me "I practically raped him because he was so drunk". Did I rape him? Is that what you would call it? He clams he barley remembers it but we are both drunk. And was it horrible of me to fuck 2 guys in one night while still technically dating someone?