See that fishing rod? See him swinging it through the air and ... CATCH. Got her again. Now reel her in... and fuck her over even worse than before.
I'm sorry to be blunt 
Dear, lovely woman, you are not the first and won't be the last to be reeled in by someone like this. He is a very sick and very dangerous man. Tribpot's posts are excellent - I absolutely agree that YOU NEED TO GET AWAY FROM HIM.
If you were an alcoholic, would you work in a pub? It wouldn't matter how well your recovery was going, how resolute you were, you'd fall. You need to get away from him - he will reel you in again and again. He knows how to do it, it's successful every time. The only thing to do is get away so he isn't within arms reach with his charm and his care and his sweet texts and his concern and his SHIT 
I'm so sorry this car crash is happening to you. I hope Caspian is ok, and of course you are ok, too. This man knew he could infect your baby - the baby he wanted to abort. At a late stage, remember? Why would he want to do that?
He knew you were pregnant when he had sex with you (I assume he was having sex with a very sick woman, half dead with hideous hyperemesis). He knew he could very likely infect you and he knew he could infect your baby. Now he tells you because he has 'to be honest'. Shame he couldn't have been honest at the time, eh. I don't want to paint the full horrific picture waves. Just get away from him - please.