Can vaginitis be cleared up by yeast infection meds? is there burning of the vagina with vaginitis as well?

It depends: If the inflammation is strictly being caused by candida, appropriate treatment should relieve you of your symptoms. If the discomfort and burning continues after your medication has been completed, an alternative cause should be considered.

Bacterial vaginitis?: Bacterial vaginitis would require an antibiotic and yeast would require an antifungal medication.

Vaginitis: Vaginitis is a non specific term for vaginal infection and inflammation. There can be infectious or non-infectious causes (for example chemicals). Since yeast can be a cause of vaginitis, then yeast infection medications can improve symptoms. If symptoms don't improve after, then there must be another cause. This can be clarified by a vaginal exam and testing for infection.