Whatever is comfortable for you. Unless your doctor has advised you against certain positions, whatever you're OK with is safe.
I usually do the spooning position.
I'm 25 + 5. Most postions are safe but I wouldn't recommend anything that involves laying down on your back due to the lack blood flow or laying on your stomach. Try side postions, that's what me and finace do now since I feel like a huge cow.
Lol I meant comfortable***
I think just whatever's considerable for you.