 [ Symptoms ] missed birth control pills missed period cramping but negative test could i be pregnant  i take birth control it has 21 active pills and 7 sugar pills and there are 4 rows in a pack i started my first pack nov10 2013 okay now dec 15th i started new pack i have only taken 6 pills out of this pack im so far behind i was suppose to start dec8 i thought i was suppose to get my period dec16 i took a test dec29 and it was negative i only have sex weds and sundays my last period was nov8   nov11 and bleed 1 day nov21 last time i had sex was dec 18th my next period should be jan 9 12 im 20 [ Disease ] it is not wise to self prescribe this potentially addicting medication    a potent stimulant if you do not have a medical need for these drugs stay away from them this is no different than self prescribing speed or any other amphetamine simply because you are tired or want to stay awake