I have been having unusual discharge since december. it is thin and has the same tan color of condensed milk and has a musty smell but not fishy. i am worried that it could be an infection. i also get pink discharge mixed in. what could it be?

Bacterial vaginosis: if the discharge is unusual for you, and has musty odor associated with a tanish discharge it most likely represents a bacterial vaginal infection. The best advice at this point would be to see your gynecologist who would accurately assess the discharge with a culture and treat it appropriately

Vaginitis : Sounds like vaginitis but 1 month is uncommon. Many different forms of vaginitis, each needs a different type of treatment Talk with your doctor (preferably GYN)