Hello my name is Taylor. I am 21 yrs old, last month I had a miss period, in which I have never had a missed period in my whole life. It s been 20 days and still no period. I have been so sick nauseas, dizziness, tired 24/7, sharp pains in my stomach and crazy mood swings. Lack of appetite. I have been on birth control for 8 months and yes I do forget to take it sometimes, but it has never affected my period at all. I have taken 3 pregnancy test and all were negitive. I was wondering if I should go see a doctor, wait a few more weeks and see if I have a second miss period, no sure what to do ????