I didn't know oral contraceptives caused weight gain. I too have been on Yasmin for the past 4 years. I have gained weight BUT for other reasons. I also see my Doctor regularily.

Everything between your Doctor and you is confidential but only up until a certain age. ( I could be mistaken) I did have a friend that had the same family Doctor as her parents since she was a child, and at the age of 19 they still knew everything that she told her Doctor. I told her that she could report her Doctor and he could lose his license. But she was to scared of being blamed from her parents and having them disowning her.

But I don't know your situation. If it does have something to do with it, you could always take yourself to a walk in clinic.

And Malachite has some good points to bring up with your parents, although I am no Meds/Bio student and haven't a clue to what he has mostly said. But put like that to your parents maybe they'll take more of a notice to it.

haha I'd print that off, take it to your Doctor and have him/her sign it, than give it to your parents as your first argumentative point. Anyways Good Luck.