Not sure whats going on, just want some opinions before i call dr

I delivered my 1st child vaginally this January, at my 6 wk postpartum check I had the mirena IUD inserted, and still no period! Shortly after I was having a lot of pain, turns out I had to have my gallbladder removed. Ever since the removal, I've been having lots of digestive issues with my body getting used to not having the gallbladder. Just last night and today though, I've been noticing I'm having fluttering/bumping feelings in my lower abdomen/pelvic region...last night it seemed to go away after I went to the bathroom and had a BM. This morning, however, this bumping/fluttering feeling will not go away, at least not for long. It sort of feels like fetal movement, but I really dont think I could be pregnant, plus the movement isnt sporadic(?) its very rythmic happening every couple of seconds, and I've had no symptoms of pregnancy like I had with my first child. I guess my question is, could this just be digestive tract spasms or should I be concerned about a possible pregnancy with my Mirena still in place? HELP.