This sounds so worrying. I can't imagine how you are feeling. You need to decide, in your heart of hears - whether if you did terminate because he wants you to - if you could ever really forgive him for that.
I would like to point out, I am totally pro choice - but only because I believe in bodily autonomy - and someone forcing you to terminate is not bodily autonomy.
Good luck OP, what an awful situation for him to put you in. There is never a perfect time for a baby, that is life.