Pain during sex..

Just want opinions...

I don't want to test again and see it be negative.

But yesterday my boyfriend and I were having Sex.

But all of a sudden out of no where my uterus started to hurt! And it was also my right side, it was almost like an overy pain. We had to stop because of the pain. What would cause that?

My boobs have gotten so much bigger, but no pain.. well very slight pain like the nipples are sore, and my stomach feels very full, like when you push out your stomach that's how it feels. And it's gotten big. Not sure why...

I tested like a couple weeks ago and it was negative.

I'm stumped..