I was on depo for 6 months, and about a week after my last round ran out I switched to sprintec. I had unprotected sex multiple times during the switch. I had my period almost the entire time I was on depo, so I don t know when I m supposed to start. I have been on sprintec for a month and have not had a period. I am extremely tired, have mild cramping, I am always hungry, have severe breast tenderness/pain and enlargement, and extreme nausea to the point it wakes me up in the mornings. I haven t taken a hpt because I do not know when I will have missed my period. Is this early pregnancy or side effects of the birth control?