Your daughter may well display anxiety disorder (e.g., Separation Anxiety Disorder) alongside mood disorder (e.g., Biploar Disorder). Biologically-based emotional disorders are best treated (unless they are very mild in severity) with a combination of therapy and medication. It would be prudent to re-evaluate her plan, and consider using medication again, in addition to some therapy.
To be honest, it sounds like your daughter is experiencing a normal - drawn out withdrawal effect from stopping anti-depressants. I have read many stories and personally can tell you as well that stopping medication such as paxil can lead to up to 3 years of after-effect.
The mood changes are very normal. I wouldn't advise putting her back on anything, but rather seek a psychologist that is familiar with cognitive therapies. These medications work as long as they are the right meds and are a permanent fixure in the person's life. Stopping them is a nightmare.. almost literally.
Paxil was touted as the best new anti-depressant on the market, that is "non-habit forming". It didn't take long before England removed that claim, yet America has not. The commercials here still claim that Paxil is not addictive.
This is not to say everyone will become addicted to it, some become ill on it and have residual effects long after a minimal dose was administered while others it works perfectly.
The withdrawal problem nearly everyone experiences. Be patient with your daughter, her outbursts can be expected.
If you need more advice - please write to me. I will check the boards often to see how you're coming along.
Best,
Anai