birth control
"I'm 19 and I have been taking Loestrin 24 for almost a month.  My periods used to be moderately heavy with a lot of cramping and would last at least 7 days.  I started my period on a Friday and started taking the pill on the next Sunday.  My period stopped before the end of the next day.  I have experienced a little nausea.  One day my stomach hurt so bad I thought I was going to puke.  It has also made me more depressed and moody.  Another complaint I have is the time between my periods.  It used to be so regular, 28 days every time.  I just started my period after only 24 days.  I am not happy about this at all, it ruined my vacation.  Other than this, no other side effects.  No acne, weight gain, or anything else I've noticed."