I am 5 weeks pregnant Is it safe to have sex with my partner?

Yes

We had 4 children and rarely stopped. Might have to be a little creative regarding positions as.pregnancy progresses.

As long as you don't have any complications such as a vasa previa, then it is okay. Your doctor would be the one you need to ask.

Many couples will have sex till much closer to delivery. But as noted, are there health issues ? Is there a reason to question if you should ?