Kissin' cousins.

This goes back to almost a year ago. Went to a really wild party at my cousin's house. She lives with her parents who went away on vacation. She decided to confine this party to her bedroom which is a pretty large, comfortable space. We were all told this was to prevent having the rest the house trashed or damaged. There was plenty of booze and weed and some coke, too. We kept the noise down (especially after doing a few lines of that kick-ass coke) because we got a little paranoid of the neighbors calling the cops. After several hours of quiet partying people were getting so drunk and fucked up on weed and coke that they either left or passed out on the bedroom carpet. I woke up about 4 in the morning in my cousin's bed. My cousin was lying next to me. Problem: She was wearing no pants or underwear. I was shirtless, and my fly was open with my dick, hard as a rock, was sticking out. I was still a little fucked up and my thinking a little hazy. I slid out of her bed as quiet as I could. I found my shirt and sneakers and left as quietly as I could. Did we do it? It's been a year and I'm still not completely sure. My dick did not have that odor of vagina that's the usual thing after I get laid without a condom. The one rubber I'd had was still tucked into my billfold. There were at least 8 people passed out on the floor around us, but nobody was awake enough to even remember me being in my cousin's bed. My cousin has no recollection of anything "odd" happening. And she has never gotten pregnant. But sometimes the whole incident bothers me. like now, on this Sunday morning. I'm getting ready to go over there with my truck. Me and a bunch of her friends are helping her move to her new apartment. I'm not sexually attracted to her, by the way. We are both in our early twenties and have grown up together. Us having some kind of sex together is just downright fucking creepy. I guess I needed to get this out of me, so I thank you all for listening. If we did have sex, neither one of us remembers it, so in some ways it's the same as if it never happened. But is it normal for me to keep carrying all this in my mind. I mean, I did wake up with a hardon.