A metallic smell is normal, I'm 1 8w1d and my cm still smells like that. But if you have itching, burning, or a bad odor and cm is like cottage cheese than its more than likely be a yeast infection and Monistat is safe to use during pregnancy.
I have the same issue, it wasn't as bad until pregnancy. Showers only help that evening I take one. My OB didn't mention anything and like above, unless it's itchy or has a cottage cheese consistency you most likely have nothing to worry about.
Thanks for your input ladies. I feel a lot better now.