Need help, I'm not a bad person and don't downgrade me because of how I feel

I'm currently 8 weeks pregnant and my fiance support me financially because I don't have insurance yet I'm working on it, he pays for $20 doctor appointments and $70 ultrasounds I used to work for minimum wage so I got accepted into a clinic that fits my part time paycheck, he drops me off to my appointments and sit in his car the whole time until I'm done, I'm grateful for that but he's free at the time I have my appointments, this is his first kid and I don't see any interest I feel like I'm alone, my doctor prescribed a medication that the pharmacist advice me not to take so I called back my doctor and we talked then she explained the situation, my fiance then came up to me and ask me if I'm an ass and that I'm talking to the doctor like I'm scared of her and that I'm paying my money, he didn't even ask me how did it go with my doctor or anything like that, he just went off, just need advice because I'm thinking about leaving him after the baby is born?? I'm dealing with more than that my pregnancy is high risk, I suffer from hypertension, I'm at home and if he calls me he always saying I should be happy he's calling me while he's at work, but he calls his friends everyday while he's at work. Anyways hes paying with money and I'm gambling with my life, I have a son that's not his kid, I had a miscarriage 2 months ago and I got pregnant right after and here I am, he accusing me of allowing the doctor to try and kill his baby, so I'm guessing this is not my baby too, pregnancy requires physically, mentally and emotionally help not just financially, I'm dealing with messy house everyday and I am tired of him shutting me down when I talk about his clothes all over, I can't raise a baby in that condition and I don't see any progress from him and my family don't even agree of me carrying his child because of this situation

Update He texted me saying that I'm trying to put up a fight now that he's letting go and there is nothing I can do. Men like this makes women leave and then put them on child support and they always saying women are evil but they never say why is she doing this