Bipolar disorder and seeking help!

I would like some help if anyone knows of answer to my situation.

I have Bipolar Disorder with rapid cycling. I have been doing my best to get off of pharmacuticals. I was taking Lexapro and Seraquel. These meds were only causing me to gain weight, gain weight and gain more weight. I tried taking 5-HTP 100 mg a day and experienced migraines and extreme nausea with it.

My question is do I have to take pharms? Or is there an alternative to pharms that won't make me sick. 5-HTP works for the depression, it just makes me sick.

Thanks to anyone that can help me.