Taking BV cream right now, going to take Monistat cream when I'm done. How long should I wait after to start the vaginal Monistat cream? A week?

Don't have to. You don't necessarily have to wait. If you have a yeast infection there is no reason to have to wait. As a matter of fact, since yeast is usually much more symptomatic, I usually have my patients treat it first and then use the vaginal medicine for BV as soon as they finish the yeast meds. Hope this helps.