Thanks for writing in.
Most likely you might be having vaginal candidiasis( yeast infection). The other features you might find along with this are curdy white dischcharge/ burning urination/itching etc. The fact that you are on antibiotics might also make you more prone to developing a yeast infection.
I would advise you to visit a gynaecologist who will do a complete physical examination and might prescribe you oral/ topical clotrimazole
Hope this helps
Dr. Divya Kuttikrishnan