Vaginitis but a Virgin???

My doctor diagnosed me with vaginitis and gave me antibiotics. I finished my last pill two days ago but I think the symptoms are still there, discharge and itching. I just looked up vaginitis and it’s says that it happens when someone first becomes sexually active (labeling vaginitis as a sexually transmitted infection) but I am still a virgin. I’m worried that I was misdiagnosed!!!! I think I just had a plain old yeast infection not vaginitis but I’m not sure how any of this works!? Has anyone ever had vaginitis before?