Is it normal to do something way out of character while blacked out?

here's the backround. i just got out of a five year relationship. Im twenty one. Extremely shy, and artiastic. Peace loving person... Normaly?
Here's the story i went out with friends after being broken up for about two weeks we get drunk before leaving for the bars im introduced to a friend of one of my friends. He's attractive. We go to the first bar were i make out with him for the first Time it happens so fast and im already so drunk, after i remeber smiling and asked if he's "gonna buy me another drink now" . He had baught a round for everyone The first time. This is already out of character for me. He buys me the long island though. i black out after drinking some vvodka out of a waterbotel he has been passing around. we go to another bar and he buys me more drinks i don't remember at all though. after that we end up at a club i remember flashes of dancing with him. And the cab ride back to my friends house is hazy. We make it there and somehow end up alone in the kitchen. This part has been explained to me by him the next morning. I want to cut him and do on the chest then i want him to cut me he scratches me twice and i goad him not going deeper. I know this is true because i can see the two small scratches . He does and its deep the fat is showing the alchol has made my blood thin and its pouring out of my arm all over the floor and my dress its like a murder scene. We start making out blood getting smeared everywhere all over my face and his. Where interrupted by our friends who freak out. Separating us asking what happened. I explain it wasn't him or anything and that i don't have health insurance so no emergency room . After things calm down. We don't have sex because where not alone again after that. But when when i went to the bathroom the next morning my panties were soaked. i had gotten extremely wet and turned on from what we did . I've never done anything like this with my ex or even secretly thought about it in my head. So why would i do it when im drunk? What's wrong with me? Is this normal?