what is the best medication for treating vigina...

vaginal fungal infection:
the above symptoms may indicates an infection to your vagina and should be identified and treated appropriately 
treatment depends on the underlying cause 
most cases can be treated with metronidazol 500 tap three times daily with topical application of gynydactazol cream or suppository 
diagnosis
to diagnosis such condition  you should visit your gynecologist who may examine the area and sent some samples from the discharge to be examined
most of the cases can present with the following symptoms 
itch 
bad odor 
discharge 
redness
painful urination 
painful sex.