I'm pregnant with his baby and I've left him?

Meet the real world - that sort of situation has happened many, many times before. Nobody can say for sure what your former boyfriend will do, but your need now is to concentrate on keeping yourself healthy and unstressed so that you can give birth to a healthy baby. If you do not want him as a b/f anymore, forget him.

No. Not likely, at least not until you don't want him anymore.

Well done you! You and your baby deserve way better than a cheating low-life who wouldn't appreciate you. He will probably try to keep running back, but the most important thing now is to put you and your baby's health and needs before anything else. Surround yourself with supportive people and enjoy this exciting time - you'll be a great mum!

Just make sure you get tested for STIs to hopefully rule out any risk in that sense. I wish you all the best.

He may try, but hopefully you won't let him because you've learned your lesson. And also been screened for STIs.

I would abort if I were you.