I have a boyfriend of a year and we have sex a few times a week. This is my first month on this birth control. I have taken my birth control on time, except maybe a few hours later on slight occasion. I had unprotected sex after the seven day recommended time frame and started on the "Day 1 Starter" plan. I have been experiencing dizziness, nausea, and bloating. I am on my second "brown" pill and have yet to have my period. I am very nervous, because before my birth control I had very regular periods lasting seven days. I am very nervous as to whether or not I'm pregnant. Should I be concerned or is this just because my body is still adapting to the medicine?