I noticed that after I had a long 2 month yeast infection my labia minora became a brownish color and before it had been pinkish is this due to the yeast infection? If so will it ever go back to pink once the infection is fully cured?

My friend has a yeast infection, but because she has diabetes her doctor says nothing can be done about it to get rid of it completely. She has experienced severe pain in her head for the past week, can this be due to her yeast infection?

If I have a yeast infection during my fertile days, hijacked my cervical mucus?
Will not be able to get pregnant this month, because I have a yeast infection in my time of ovulation?