IM PREGNANT! ADVICE.

So I got pregnant after finally leaving my narcissistic emotionally abusive ex. I’m in nursing school right now and I’m only like 2 weeks. I don’t want to keep it bc he makes more

than me and he told me if I ever did he’d do everything to get full custody, I’m not ready. Should I let him know? Is that the right thing to do? Like tell him just so he knows but explain I’m not going to go thru with it or just don’t tell him??