I would just say what you said here, that you are more comfortable sticking to meds that are tried with proven results for bipolar. That drug you got isn't and that would raise a flag for me.

When I get any new drug, first thing I do is google it. It's my health and body and I want to be an active participant in my care. Also Dr's don't always tell you all the side effects, drug interactions, and warning symptoms. I got lithium toxicity from not being informed that ibuprofen and other anti-inflamitories can raise your lithium levels. So now I always check everything. Two weeks does not seem long enough to know if it's working to me either.

I'm trying to get a new pdoc right now and my medications are not working. It is hard for me, like you to talk to my doc about these things. But it is your mental health so it's worth running the risk of offending her.