This is the fist time i have a yeasts infection me and my s/o (we did it) a day before my period I have irregular period I was supposed to start my period last Thursday of the 24 of September instead yeast infection came? I'm really worried! how can you treat the yeast infections? What do you have to do? Also i haved a bad cramp i usually never cramp...its started the week before my period started...and did I also say we are convencie to have a child! :) its will be the firsts one! Another question in what age did yeast infection Happen?