Really, your parents have no right to force it on you.

I'm on the pill for my period pains, and I love it. But then, weight gain doesnt bother me because I'm already too overweight to tell. So I know the pros, and some of the cons. Not just weight gain - the pill increases oestrogen levels in the water which contributes towards male infertility (along with smokeing etc).

Sorry, can't help going off on a tangent. Slightly.

Like I said, your parents can't force it on you - your parents may be able to decide if you have treatment for a life threatening thing until you reach a certain age, but you don't need the pill anymore,, so it is totally your choice.

Talk to them like an adult. Tell them it's you're choice, and you understand that they may have concerns, but you're fine and this is something you don't want.

Obviouslt you have to give them reasons, try and make it like a debate, talk down their reasons:

You might be worried that if I stop taking them then my polycystic ovaries may come back, however, that is gone, and yes there is a chance they might come back, but on the pill there is an increased risk of cancer. I can take the pills again if the problem comes back, and the less of them i take the less likely I will to have cancer, which is incurable.

Do things like that.

To them you're there child, no matter how responsible and adult you can be. But that's no reason to not act like that, even if PMS makes you wanna scream and throw things.