Sounds like an ass. If I was you I would cut off contact with him, he sounds very unstable and seek legal counsel. You don't need the stress honey.
Maybe once he has calmed down a bit he might be worth talking to, but if I was you let your lawerys talk to his.

P.S I didn't have a dating scan....they are only necesscary if your unsure of when you conceived. So the first scan for me will be 12 week Nuchal.