Herpes or yeast infection?

Soo I've been to the doctor more than 3 times. I have this white this charge. I went and got it checked and they kept on telling me it a yeast infection and gave me mess for it and it didn't help every time. Then I went to the doctor with my mom and she asked about a white discharge. The doctor said it was normal to have a white discharge and I looked on the Internet that when you have herpes the white discharge usually mistaken for yeast infection. I have yeast infection before and the meds worked before. Idk if it's suppose to be normal or it could be something going on. And another thing the last time I went she said that I had a little bit of white blood cells. I don't know it's from the yeast or from herpes.