My relationship is over and I'm 32 weeks pregnant

I've been engaged for a year. We were supposed to get married this year but postponed because I found out I am pregnant :) and I just personally didn't want to get married with a baby bump. When I first told him I was pregnant everything was great. We were so happy. He told me he would start taking care of the house work so that I may relax. My first week to my 16 week I've had terrible sickness all day long but because I wasn't becoming dehydrated my doctor wouldn't give me anything extra to help me. I could barely move without becoming nauseous. So I didn't help much around the house because of it but I tried. Around maybe 20 weeks he started making comments about how he's tried of cleaning up behind me. I tried my best to help with what I could but I literally have no energy and start to get dizzy after standing too long. I work 50 hours a week in sales so I'm constantly on my feet all day and when I come home I try my best to do what I can. Well we also have a four year old (my son from a previous relationship but he's taken him as his son). My fiancé works 3 am to 11:30 am so I basically take care of my son the majority of the time which is fine. The past two months though my fiancé has treated me so horrible. He tells me I'm ungrateful, and filthy, and a lazy pregnant person. And that I use it as an excuse not to do more around the house. Which I told him that I do the best I can and that he's the one that started saying he wanted to do everything so how can you turn around and be mad at me even when I try to help. He told me that when his mom was pregnant she wasn't lazy like i am. On our anniversary this year he didn't talk to me all day and when he finally did he tells me that after this baby he wants me to get a second job because he wants me to work 60 or more hours a week since that's what he works. I told him I'm not getting a second job because then I'll never see the kids. And he tells me it's only fair that I don't see them since he can't see them because he works so much. This has been the past two months of insults. I finally broke down last week and threw a plate at the wall which I'm not happy about but I'm so angry that I try the best I can and I get nothing but disrespect. We found out a month ago that I've developed a rare pregnancy disease that basically breaks your body down until it's weak. Which explained why I'm always dizzy and tired and feel incapable to move around a lot. Still I get nothing but shit from him. I basically only see him a few hours a week which makes me feel lonely too. So yesterday he was off work and I got off around 7pm. He calls me to tell me that he's going to bed at 5pm because he wants to go to the gym at 3am tomorrow. I got upset at him because I felt like he was cutting me out of his whole day. He was gonna go to sleep before I even get home and it made me really sad and angry. He responded with "you don't give a shit about my health, do you want me to be fit or not. I've never met anyone like you that complains about someone going to the gym". And I told him it's not that it's the fact that you don't include me in your day or even think about at least seeing me first. I told him that because of our sons nightmares I've been up every night for the past month and it would be nice if he would at least offer to put him to bed. To which he responded "until you start working 60 or more hours a week I won't be helping with either of our kids. It's only fair that since you only work 40-50 hours that you take care of the kids too" I came home and he said the same thing to my face. So I gave him his engagement ring back and left for my dads house for the night. I'm back home now and he hasn't spoken to me or my son. And he just put his coat on and left. So this is it. My relationship is over. I'm 32 weeks pregnant. I ended it and I'm sad but I feel like I'm drowning inside with him. So that's it really. Sorry it was so long but I don't have anyone to talk to.