If you can't, please, please tell someone. Your mum or dad would only want to help - they might be a bit frightened or angry at first, but parents always love their kids, no matter what they have done, and will always help. Some epilepsy medications do reduce the effectiveness of the Pill. For example, phenytoin, carbamazepine, phenobarbitone, primidone, topirimate, ethosuximide. These epilepsy drugs are 'enzyme-inducing' which means that they speed up the way the body breaks down the Pill, leaving you without adequate protection.
Some epilepsy drugs have no effect on the Pill.
If you are taking an enzyme-inducing epilepsy medication, your GP may prescribe a higher dose version of the contraceptive pill. If you are concerned about your epilepsy treatment and contraception, don't stop using epilepsy medication. Consider using additional contraception until you are able to discuss the matter with a doctor or nurse. So for a few months now, on and off, after I've overeaten, I've been making myself throw up. I didn't think this would do me any harm, as I eat normal foods after I throw up, and I never throw up everything that I've eaten, so my body is still getting food.