l infection- possibly yeast/bv?

You need to get to a doctor to see what the actual problem is. Do not self treat as some treatments for some diseases can be bad for others. Cranberry juice helps with bladder infections, so unless its burning when you pee and you feel like you have to pee all the time it probably won't help. Eating the yogurt won't help, you put it in your to help balance good and bad bacteria. But I wouldn't suggest it if you don't know what is going on. All in all, SEE A DOCTOR as soon as possible.