When I have ovarian cysts, they cause the same pain you described and cause constipation and sometimes affect urination.When my varian cysts burst, i get a pain and pressure that travels down to my rectum and the pain will stay for a few hours and then finally go away slowly.. I’m sadly used to the pain as i get it almost every month now but the first time sent me to the ER.
My IUD caused me to get a 6cm cyst. In 12% of patients with the Mirena IUD, they developed ovarian cysts. Because of the size they ran a CA125 blood test which can detect protiens that are typically found with Ovarian Cancer. All came back clear thank God. I have to schedule surgery to have the cyst removed. I have since had my IUD taken out.
It caused almost constant pelvic discomfort, odd periods (which would stop then come back and I would have a weird discharge) etc. Very frustrating!
Just a heads up, it could have something to do with your IUD. Maybe not, but it could. And ovarian cysts are very very common.
No I am definitely not pregnant. I have made an earlier appointment with my Gyno, will see what he says...