i have been sick and was taking a z pack and with that i had totally forgot about taking one of my BC pills, this was a tuesday.A few days later on saturday i got really bad cramps and noticed brown spotting it has been 4days and i still have this its now slightly heavier and red, my period always comes on thursdays, so this thursday comming up would be my regular period. i have no idea whats going on and im scared of being preg. has this ever happened to anyone else, what happened?