If in doubt, wait. Allow yourself time to see if you're just panicking at the prospect.
We travelled all over with three children, all adults around your own age now, and had wonderful times, enhanced by sharing them with our children and seeing their responses.
I would say, only terminate if you truly don't want any children, ever, because that may well be the outcome. There is never a right or perfect time to conceive and have a child, so if that's what you're waiting for, perhaps you will wait forever.
I think that's the key question: do you want children at all, ever? If you do, the time is now, with this pregnancy. If you don't, it's time to be honest with yourself and your DH. No fudging.