So i am on microgestin fe 1/20 the 4th month and im on the 3rd day of inactives... 2 days before the inactives i had mild cramping and some blackish brown blood. Not alot. I had asked if it was normal and i was told yes. Now ive never missed a pill and im not on antibiotics and typically by now i start my period. Im having small cramps here and there but nothing yet... my friends mom said theres a chance i could be pregnant but with perfect use? Should i be worried? I mean i take them perfectly