I try to stab my boyfriend unconciously

My boyfriend and I have been dating for 9 months. He was my close friend since 2011.
We had an issue regarding pregnancy and abortion. I recently found out that I was pregnant with 5 weeks foetus and we made a decision to do an abortion. It was hard since I'm in college and we weren't planning to get married,not just yet.
And so the incident happened the previous night, it was the day I took medication, we shifted our place and he came to help me out as I couldn't eat or sleep for the past few weeks I was immesely tired and weak. We had a small house-warming party, since some of our friends came I decided to join them for a drink as everyone is going to be drunk and I don't feel nice to be left out. I had one bottle of beer and two shots of whiskey. I was already high, but my boyfriend acts as if he was ignoring me, he was not with me instead ,he was downstairs with my best friend they had a conversations and a few laughs which can be heard from the terrace, all of us were at the terrace except my boyfriend and my best friend. So my roommate came upto me and started talking stuffs about my boyfriend and bestfriend, and I started to accuse my boyfriend but deep down I knew that it meant nothing but still I was sad and altogether furious by the situation.
I went downstairs to confront my boyfriend, that was all i remembered.
The next day I woke up with a heavy headache and came to know that my boyfriend was not sleeping beside me. I called him up but did not pick up his phone several times, he picked it up and told me what happened last night.
He told me that I was acting super crazy, he told me I slapped him 5 times and try to run away from him but he stopped me and I got even more angrier and took a small kitchen knife. He was not aware that I have knife in my hand so he accidentally grab the knife from my hand and cut himself, it was not deep but still he is scared of me. He said he loved me so he did not try to hit me back. I was crying so hard and loud which draws our friend's attention. And now he is not mad at me anymore, he said he forgave me, but he said he is not sure about our relationship anymore. But still he said he don't want to break up with me either. Neither do I want to break up with him because I love him so much.
The thing which disturb me most is, I was not aware of the whole incident. It was a feeble memory which I had as a dream. Is this normal? I'm scared. Please help!!!