I am 23, 103 lbs, and I haven't had a period since April 3, 2017. cervix is high and opening is swollen. vaginal discharge is creamy white. decreased appetite last 5 days with headache and nausea. still get 3 negative pregnancy tests. I am naturally thin for my height and age so I do have irregular periods at times, but I've never fully missed one. If I'm truly not pregnant, then what could it be? hormonal imbalance? We don't use birth control but use the pull out method. We are not trying to conceive but whatever happens, happens.