Onion smelling dicharge. it started about 2 days ago. i got test yesterday for all sti,thursh, bv, everything come back clear. what could this be?

No onions in the dip: Hopefully there are no actual onions down there! But I would review all the findings with your doctor and consider a retest. Some infections such as Bacterial Vaginosis and Yeast can be easily missed. Its definitely not a normal odor. Good luck

Odors from diet, etc: You are noticing ammonia type odors in your vaginal discharge. This could be a result of a recent bacterial or yeast infection, or from residue of certain foods that you have recently eaten. It is not serious, although unpleasant. Try to wait it out for a week or so! Try altering your diet also.