I have been bleeding for a week now and I've been on the generic of Yaz for over a year. I'm supposed to start my period next week. I've contacted my doctor and she said it might be break through bleeding and to double up on the pill. I'm worried cause I'm bleeding almost as much as I do during my period. I usually get light headed during my period from blood loss and I'm getting that now. Is break through bleeding normal? Is there anything I can do to help with the light headedness?