Please help....what should i do if i all of a sudden have a cheesy vaginal ordor. could if be an std?

Cheesy odor: Cheesy vaginal odor more likely to be due to yeast infection instead of STD. Also likely to have vaginal itching and burning. You can try over the counter antifungal vaginal cream such as monistat. If you still have symptoms, follow up with doctor to evaluate odor and discharge.

Likely bv, but: you should get it checked out by your gynecologist who can also culture you for std if you have had new exposure.

One swab : Studies show 20% of women with a yeast infection have BV at the same time. Go to urgent care or OB/GYN and get a swab that will test for all STDs. Empirical treatment helps while results are pending.