last week, i was put on antibiotics for dental work. i had to take 4 everyday for 7 days. now supposedly too much antibiotics can cause a yeast infection, so ive been eating ALOT of yogurt. today, there was a strip of discharge on my underwear it looked a little bit like yogurt, it didnt smell bad, i dont have any itch or anything like that, but im wondering if this is the start if a yeast infection?? if it is, what can i do so it doesnt get worse?? please help...