birth control
"I have been on this birth control before (this time) and had no problems with it.  This time, when I started using it again my breasts were very tender the first two months. I have had no problems with my period coming when it is supposed to while I have been on Sprintec.  I am on my fourth package right now and only half way through the month.  Last night I woke up because of cramping was up for 1 1/2 hours with really painful cramps in my back and pelvic area.  I woke up this morning to discover that my period had started, a week and a half early.       I have also noticed that my skin has been much more oily this time around and I have been getting acne increasingly on my face and upper back."