What would you do?

*For the typical behavior question. He accuses me of cheating all the time playfully. But definitely not to this CRAZY extent.

My husband took a double dose of his adderall and is now accusing me of "micro cheating" because a guy liked some of my posts on Facebook. I've never had a conversation with this guy in my life. I said I've never talked to him and don't interact with his stuff. He freaked out and said I "haha'd" interacted with one of his shared memes from the beginning of the month. So now I'm a liar and a cheater. The guy liked a picture that I posted of my husband and our son that I posted for father's day. My husband said that he's probably trying to drop a hint that the kid is actually his and not my husbands. And is genuinely questioning the paternity of that son (we have 2 with one on the way). Also today is my birthday and he is saying how BAD it looks that a single dude is liking a married woman's things (occasionally) and told me "HBD" today on facebook. That I'm being a disrespectful, lying, cheating wife and embarrassing him. He blew up like this all in front of our kids too. Saying mommy's a cheater.

I told him if he is going to genuinely question the paternity of his second born because of some facebook rando then he needs to get out. He said No, berated me some more then went to take a nap. I am 23 weeks pregnant and I have been with him since I was 15 years old (today is my 26th birthday). He was being so aggressive with his words that even my sons were telling him to leave and that he needed to be quiet. He kept telling me over and over to fess up and stop lying.