Going crazy..someone pls help!

Hey ladies! Me and my boyfriend were trying to conceive for the past 3 months and when we started my periods were very irregukar. I was having a period at least every two weeks or sooner. (Very aggravating) so one day I went to my doctor and he prescribed me birth control for a month to try and regulate my periods. It did regulate last month but now it's been a little over three weeks since my last period. Which glow shows I'm two days late. Not sure if I should wait it out or what because I was having mold cramps like I was gonna start today bit I havnt.. please someone help..have any of you went thru this? Could I possibly be pregnant? Thanks so much girls!