I'm 17 years old, I think I have a yeast infection. I'm a virgin, and my crotch area has a bad, fishy smell, I'm trying the 7 day cream but this might sound stupid but I can't find my vagina opening. It's embarrassing but is it because it's too small? I tried my best to put the tube inside but it didn't even go inside to apply the whole tube. How can I apply it better?