Clindesse side effects

I am experiencing persistent nausea - similar to being pregnant (which I am not!). My Dr. wants me to use Clindess once a week for 3 months (!!!) as we have been unsuccessful in treating the BV with anything else but I seriously cannot take it. I cannot function with nausea like this for the next 3 months!!!

Not even a minute after using, I began to feel faint and have trouble breathing. It passed after sitting down for a few minutes... but it really had me scared. I contacted my doc the next morning, and she hadn't ever heard of this side effect with this drug.

Started taking 2 1/2 days ago for BV. Also taking Flagyl. I have noticed a thick discharge that resembles pottery clay!! I've heard the grayish discharge is normal and can last up to 2 weeks. I was wondering what else may be in store so that there are no surprise side-effects.