Ok heres what happen I'm on gianvi birth control pills ( the generic version of yaz) I was on yaz for two years and my periods were light but always there . but about 3 months ago i switch to Gianvi in october month my period came like normal but couple of days later I had some more spotting felt like i had two periods . november month i had unprotected sex RIGHT on the 14th day mark of my pills ( If i wasnt on the pill i guess i would be ovulating? i know...great timming..) the thing is i had taken my pill that day but threw up about 3-4 hours later ( HOPING it made it into my system I didnt double up) now my period is no where to be found...the only symptoms i have is NO PERIOD GASSY I taken a pregnancy test 21 days from the unprotected sex and came back negative ( 4 days missed period) ( had sex on 11/21 took a test 12/12 ) and I'm still taking my pills even tho novembers period never showed up.. I'm practically flipping out . I just want to know was that pregnancy test accurate enough? why on earth am I still gassy till this day but no periodAnyone else missing periods on gianvi?