I’m 38+2. Last night I woke up to pee and had intense pain only in my right lower back. It did not come and go - it was constant for probably ten minutes. I’ve had natural child birth with my first, and this pain made me thinking epidural. I was able to pee and that did not help. I got back in bed and went back to sleep. It went away and has not returned. It was almost like a really bad really long Charlie horse just on one side of my back. What was that? Has anyone else had this happen?