I am sorry it is going to be a long one but I truly need your advice.

I know for a fact he is a narcissist. I have read 10 books and 100s of articles about their actions and it seemed like I was reading the story of my life.
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We went out with my friends and I had too much of drinks. Once all my friends left he started saying what he doesn't like me and etc, and I told him "Hey, why are you telling me this right now? I am drunk! I don't want to talk about it! I am celebrating my thesis defence". He got mad about it and kept complaining while I was crying in the car. At one point he got frustrated and mad, he dropped me in the middle of the street in front of my house while I was crying and drew away (and I told him we have guests over and I can not go inside the house). Called me after and said "Your actions could have got me in trouble cos I was drinking and driving! Neighbors could have called 911! You are selfish and irresponsible (he was the one who was drinking and driving, not me) and I know you are going to a friend's place but remember I will be the one who will look like an ******hole". I would like to mention that I hardly ever drink (twice a year), yet he gets drunk every weekend. Anyways, he never really apologized, called me a drama queen. For two days he didnt answer my calls or texts. Two days after this issue I told him I need a break and I need my stuff I left at his house. All he said was "ok". I picked my stuff while he was at work, left all his together with the gifts he gave me (The only reason I did that was cos for two days after the fight he treated me like crap and acted as if he doesn't know me and ignored me).

The night I asked him to take a break, I woke up in the middle of the night with the worst cramps ever and blood as well, and ran to ER. Apparently, I miscarried our baby (and I even did not know I was pregnant as I was on a birth control). I texted him in the morning saying "I did leave your stuff and just wanted to let you know that I miscarried our baby and I did not know I was pregnant either, I thought it would be fair for you to know." All he said was "Why did not you tell me about this?" I explained the situation and he was pretty much ignoring me. I was so lost, confused, still in physical pain and in shock, that I was desperate and had to call him in tears, and all he said was "What do you want me to do? You were the one who dropped all my stuff and wanted a break. I am sorry it happened!".
My miscarriage wasn't going well and I had to go to ER again , I was begging him to come, yet he didn't. Later he explained it to me saying he thought I was lying about the baby as his ex has lied to him about being pregnant and going through an abortion.

He came to see me in three days and when I asked him why didn't you visit me earlier, he said: "The way you were talking to me seemed like you want to do nothing with me". And during the discussion, I said: " I have never been a priority for you." He said, "How can I choose you over my family and friends when we have been together for a couple of weeks?! Were all your exes leaving work for you only cos you asked them to???" I literally could not believe he said that cos the only reason I asked him to leave cos I was in ER and it was an emergency.

So three weeks after this situation I made him to give me a closure, as I believe 3 weeks is more than enough to figure out if you want to be with someone. And he broke up with me.

How can one break up just after one fight..how?