Scared and confused

So I’m 17 weeks pregnant with my first child with my husband of 7 years. I’ve had a rough time with stress with all kinds of things but this week has been horrible my dads in the hospital and very sick. I can’t control my emotions and I am always the one who keeps it all together but I can’t be that person right now. My husband has told me not to worry about things and he is there for me which is how it should be. Ive been complaining a lot to him lately because he has always been on the lazy side and doesn’t really finish anything but won’t admit it and tells me I’m crazy. It’s hard to deny it when it’s something everyone knows about you. I am tired tonight after being at the hospital and just want to go to bed but I can’t beaus he’s working on our bedroom trying to finish some drywall so he can paint this weekend. I get to bed and he gets mad at me for idk what and then tells me he’s done he doesn’t want to be with me anymore and wants a divorce. He’s been weird with me and doesn’t want to be around me lately and the last time this happened it was because he was talking to another woman be cause “ you weren’t there for me” and when I caught him sexting her while I was sleeping in bed next to him excuse was “you fell asleep”. I’m so upset and don’t even know what to think. I feel like I’m in the middle of a nightmare and can’t wake up !