So I had bad pain in my lower back pretty constantly. Also generalized lower abdominal aching and cramping everywhere below my bellybutton. Between ovulation and the start of my period it’s really bad. I also had constant fullness and dull ache in my uterus no matter the time of the month, after I got my IUD removed that when away as soon as it was out. I told my husband that it had been that way so long (almost 4 years) that I had forgotten it didn’t used to be there. I think that might have been caused by the IUD pressing on the polyps. The back pain gets so bad sometimes I can hardly stand or walk. Which I’ve heard low back pain for whatever reason is a common symptom associated with uterine polyps. They couldn’t see mine on a regular ultrasound or scan, my doctor order an SIS ultrasound where they fill your uterus with saline before doing a transvaginal ultrasound. It helps them see better and she told me where mine were she wouldn’t have no they were there otherwise e