How to overcome painful sex during pregnancy?

As stated in title, I’m 12 weeks pregnant and have been experiencing painful sex since about week 3 (before we even found out we were pregnant).

my partner and I are obsessed with each other and had such a super high libido pre pregnancy. It IMMEDIATELY disappeared in first trimester and we’ve tried a handful of times, but I feel mostly pain (like swollen lips??) and a burning aftermath.

Anyone else experience this? Is this a pelvic floor thing? How can I overcome this because I love having sex with my man and would like to get back to that.