I am chronically prone to yeast infections. For me they involve itching and burning and if they get bad, I get very raw and bleed. I don't have any unusual discharge. If it has been a long time since you had a yi, make an appointment to see your doctor (gyn or gp) and they can tell you if it is a yi or a bacterial infection.
You can try an otc yeast medication and see if that gets rid of it. Also step up the probiotics. You can also use PLAIN yogurt as a topical application. It will soothe and the probiotics in there will help. As for a prescription to request, you can ask for diflucan. If OTC meds don't work for me, diflucan usually does.