Hi, For The Past Week Ive Noticed That Ive Had

Hi,
for the past week ive noticed that ive had really creamy vaginal discharge with a sour like odour (smells a bit like yogurt). Also I am not sexually active and have not made any rapid changes in my lifestyle such as a change in diet to trigger this. Is there a possibility I have BV or a yeast infection? (Ive never had this before) I would say I am a generally healthy person I eat right and exercise 3/4 times a week, dont smoke or drink alcohol.

Thanks.