OUCH! Why is sex hurting SO bad?!?!

Annie
So, like the past two weeks, I have been having SO much pain when me and my husband try to do anything! Tmi, but even a finger feels like a knife! Also tmi, but it feels like trying to rip a dry tampon out, if that makes sense! We've tried lube, no yeast infection, what gives?!?! I'm 19 weeks today! What is this?!