What Causes Vaginal Discharge With Odor?

vagina discharge fishy odor and light patches of skin goosebumps on my arms back of my neck. 28 female 5'11 around 150lbs. this has happend before but i cant remember what my ob said and the meds she prescribed and that my skin flares up this way as a signal that i have an infection. and im always suceptible to yeast infection and i treat it with canesten tablets but its doesnt look like cheese curds anymore so know its not yeast infection.