I've been on birth control for about 8 years now. I take the pill the same exact time every day and never miss, and I haven't recently switched pill brands. It's now Thursday, I'm due for my period Momnday morning, and my breasts started to get sore last Friday. I usually do get sore breasts, but it usually doesn't start untill about 5 days before my period. I don't remember the soreness starting this early, and it seems a bit worse than usual. Not unbearable, but deff. more sore. I haven't had any other possible pregnancy symptoms, but I've heard that PMS symptoms sometimes vary with each cycle. Does anyone else experience different symptoms with different cycles?