I Feel Like A Menstrual Cramp Pain. I Have Absolutely No Symptoms To Indicate I Am Pregnant.

by the first days of this month I engaged in some unprotected sexual activity , afraid i was pregnant i took a home test and both were negative, two weeks later got my period and a week or a little more after took another home test and was negative. since I was a child i have suffered from constipation , but I am a lot more gassy and if i put too much pressure on trying to poop or release some gas it kinda hurts. not like a menstrual cramp pain, another kind of pain. I know I am not pregnant but I just go nuts every time I feel the pain, but I have absolutely no symptoms to indicate I am pregnant