Dear Patient, As you mentioned,you have been under an extreme amount of stress which can disturb the normal flora in vagina. When the normal vaginal flora is declined, pathological bacteria can rapidly grow in vagina and remove slowly normal vaginal flora and causes bacterial vaginosis. And your Bartholin cyst can be due to accumulation of fluid due to obstruction of the opening of the Bartholin gland. This can be due to an infection caused by E.Coli or sexually transmitted like Chlamydia, gonorrhoea or even secondary to BV. Going back to your question, yes , your bacterial vaginosis can be non STD related. However, It is good that you went for STD testing and it will help to screen sexually transmitted infections. Also your sugar level has to be monitored because diseases like diabetes mellitus can exacerbate your condition. I strongly recommend you to see a Gynaecologist and her or she can be the best person to help you in your situation. Your gynaecologist will perform a pelvic exam and take vaginal secretions for testing. He or she may prescribe necessary antibiotics like Clindamycin, Metronidazole to eradicate the infection and surgical drainage may be needed for treating the Bartholin cyst. Take care! Good Luck! Dr. Dinesh Weerasinghe MD.