Help !!!

Stephanie
Posted to multiple boards , 
No answers !
So I am 21 , a wife and mother to a beautiful 18 month old princess . 
I have melanoma skin cancer . 
Me and my husband have been TTC baby#2
I went into to OBGYN today to check for Endometriosis , see I have been having very painful pains after sex, To the point where in on a ball in bed . Lasts for a few days , Bowles hurt , peeing hurts , all around my uterus and back .
As I was getting my pelvic examine , my doc seemed very concerned and asked if I was hurting in that area ! I said YES! Told me to come back for an ultrasound immediately , said my uterus is enlarged ..
What could this me ... pregnancy ... ?