So I have a really heavy flow and I get really bad cramps to the point I start to throw up and Ive told my mom and my mom just says to take pills and pills work alright but I am in a relationship and would like to be on birth control just to always safe. We went to the doctor and the doctor said that I should be put on birth control and it will help a lot but my mom doesn't want me to be on it. So how can I convince her or what should I tell her?