It could be bacterial vaginosis which causes a foul odor. Most of the time the discharge is not yellow, but some women have reported having a yellow discharge with it. I agree that you need to see another doctor and get a second opinion.
but there isn't any itching and i have had a yeast infection before and it doesn't feel anything like that.
Find a diff Dr. Sounds like a yeast infection. Go to a store and by over the counter cream froe yeast infections. It can't hurt...but could possibly help heal.