SSRI-class anti-d's have a dependency, and that's maybe why it quit working; you're body and brain just used to them. Plus, as was said above, an SSRI without a mood stabilzer is extremely risky for someone with BP. I'm kinda surprised it was prescribed especially at such a young age, when it's been proven that it can cause an increased risk of suicide in anyone under 25.

I agree with the above posters. Seek either an immediate appt with your current pdoc, or get a new one, and most definitely tell your parents exactly. Hypomania can lead to mania in some, and it sounds like you're on your way.