You should go to your health care provider/doctor, as no one here can diagnose you, it could be several things that can be treated, don't worry about it being std's, as std's take a longer time period to show symptoms. You should get a pap done, get checked for any vaginal infections, and also, resume getting tested in 4 - 6 months time, to be sure you have not ended up with any sexually transmitted diseases from having unprotected sex.
Do as anniebrooke says!!!!
The classic cause of a bad vaginal smell (especially if right after your period) is BV. It should be diagnosed and prescribed for by your doctor, though, not online certainly and not even by you, since you need antibiotics to get rid of it if that is what it is.
Why don't you say you're bisexual then?
The vaginal smell could be bacterial infection, yeast infection or std. Why don't you get tested at your doctor office?
We can't assume what the smell is coming from...