I've been itching and burning down by my vulva area. i assumed it was a yeast infection and used 3-day monistat with cream but i'm still itchy. ?

Infection: You need to see a doctor, it maybe a different type of infection

Bacterial: You could have a bacterial vaginal infection that can cause similar symptoms. Another possibility is an allergic reaction . See your doctor or urgent care for exam and testing

Bacterial Shift: Sometimes a bacterial shift/vaginosis can mimic a yeast infection. Id get a full check up with your doctor as this is easily diagnosed and treated once they see you