"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."