Help, Help, Help 😩

I started getting these unbearable cramps in my back and pelvis like bad menstrual cramps. I stopped my period a week ago though! The pain started yesterday in the afternoon and eventually tapered off after a few hours and I woke up with them this morning. It's making me unbelievably nauseous. Lately the past month or so, I've been getting bouts of nausea and I'll want to puke. I've taken pregnancy tests, all negative and my period is on schedule every month. I passed off the pain as ovulation pain at first, but this just feels so extreme.

Has anyone else experienced this? I just want to hear from someone whether I'm alone in this or not?

(I also feel like my back is particularly in pain ever since I had my son and got an epidural cause of back labor)