Ive been on the pill for about a year now but I decided in the past week to change the time to later on at night instead of waking myself up every morning very early. I recently had my period also about a week ago. I changed the time of my pill when i started my new pack after my period. But since then I have felt nauseous, my breast and nipples hurt and recently have cotent pink discharge i doubt im pregnant since me and my boyfriend have only had sex once and used back up contraceptive. Could it be the hormonal imbalance in my body since i changed everything around? Im very worried??