slightly constipated, menstrual type cramps trying to poop???

Hailee
This is so weird, but does anyone know what it would mean when I'm trying to poop and my abdomen contracts feeling like menstrual cramps? 🙈 I've been constipated off and on for a week now & first noticed these cramps while pooping after my one day period this past month. & they radiate into my belly button... I haven't tested for pregnancy in several days because they had all been negative, maybe I should test again.