Advice needed

Hi all, I need some relationship/ baby advice. I am 6 weeks +4 pregnant I had an early scan yesterday and my other half has constantly said “I don’t want it” and putting it down, we haven’t been together long but it was an accident my shot wore of early (I’m 20 he’s 23 for context as to who we are) he had been asking me to terminate since we found out 3 weeks ago however he did say it was my choice and we would go through it together regardless ( i have endometriosis and pcos and never thought this would happen so the idea of termination isn’t really on the table for me) so the decision came 2 weeks ago that we were keeping it and he’s seemed like he’s been on board. However tonight it all kicked of after the scan yesterday and the first midwife appointment he said “I don’t want it but I’ll have to put up with it” which really hurt my feelings as I’ve been really struggling and constantly trying to make him happy and he said “I want kids but I don’t want them so young i would have to sacrifice my car shows and going out I just didn’t realise I’d have to do it so young but I’ll have to put up with it won’t i” and he’s just being so “me me me” and what he’s sacrificing it’s like an accusation! I have offered him an out I said to him if he doesn’t want to do this don’t do it he can leave right now and I will do it alone and he said no he wants to be with me etc. I was massively upset and crying and he went out to see his mates this evening I’ve left to go stay at my mums and he said he needs space to breath and think and I’m so confused. Am I in the wrong? Should I just leave? Someone please advise as it’s breaking me apart all I’ve ever wanted is to have a baby and now it feels like I’ve done something wrong even though it was an accident and I shouldn’t be allowed to be happy about it.