It is not a choice or decision to HAVE child.
it is an active decision to NOT have children. ( unless you are sadly infertile)
So many people choose to ignore this. including your dh, like many men
every time he has had sex without him taking active task to absolutely prevent pregnancy, he has also accepted that there is a risk you may have a child. Like every man who has ever had sex. Funny it’s women that mainly worry about that
few methods of contraception are 100%.
And when they don’t work 100%, you alone will need to make another active decision to terminate, if you do not want to have a child.
Saying he doesn’t want children, after he’s had sex, where he’s failed to take any action himself to prevent a child, knowing you wanted one, is negligent, lazy. Or someone who is persistently completely ignoring that sex equals kids as a default position.
Only you get to make that choice now a pregnancy has occurred. He made his choice when having sex
if he doesn’t want more children, has he signed up to have a vasectomy? Or is he just going to abstain from sex now? That’s his choice now, whatever happens