Hi I have been on Sprintec for nearly 4 years. Typically my breasts get sore a week before my period. However this time they are getting sore a week early. I'm under a lot of stress from graduate school and was wondering if this is due to stress or if it could be due to pregnancy. I take the pill regularly and I have not missed any pills this cycle. I have noticed fluctuations in my breast size and my boyfriend and I both agree they had gotten a little smaller for the past month or so. Also the past month or so I have had trouble sleeping at times and I if I get up from laying down or sitting quickly I sometimes get dizzy. Just checking to see if this soreness and more fullness is due to the pill.