What is this pain AFTER sex durring pregancy

mu

Pregnant with my third and every single time after my husband and I have sex my vagina hurts and feels like it’s being pulled toward the ground in a dull pulsing pain.

It makes it hard to walk and I find myself feeling better when I sit or lay down. It can be mild to severe but it’s always AFTER we have sex.

What’s causing this? Because I find myself only wanting to have sex at night time when I don’t have things to do because it can completely derail my entire day and plans because I’m in so much pain. Weak pelvic floor maybe?