You could be pregnant, or have a serious underlying medical cause for your symptoms, including diabetes or a weakened immune system (which may be due to HIV - the virus that causes AIDS).Stop use and ask a doctor if,symptoms do not get better in 3 days.symptoms last more than 7 days.You may have a condition other than a yeast infection.you get a rash, fever, abdominal pain, or a foul-smelling vagi