I thought it was a yeast infection, but I'm not so sure anymore. Its a reallly bad odor, I don't have any discomfort, or and itching or burning though. What could it be?
It could a be a variety of things. It could be BV bacterial vaginosis chlamydia, gonorrhea, and other infections are possible, and so are several other non-STD problems
You haven't stated whether you've had unprotected intercourse with a new partner or if there is discharge and what color it might be... so there are many different possibilities.
You may want to see your health care provider or a gynecologist.
Whatever you do, don't douche as that will just make things worse. Stay away from perfumed soaps and sprays. And also wear loose fitted clothing and cotton underwear. These might help.
xox Sika
Hm. Drink lots of water.