A white discharge cam be associated with any infections ma'am, not just a yeast/fungal/candida infextion. Your non-responsiveness to the anti-fungal treatment proves that you were/are most probably not suffering from a yeast infection.
Although most of your symptoms have subsided, they are still present which means you will have to report to a doctor and get your urine and vaginal swab tested. This will help in diagnosing and accurately treating your condition.
The response you experienced with benadryl
was purely an anti-inflammatory response, which relieved mosy of your discomfort. Do not worry, your symptoms will subside within 24-48 hours of initiation of treatment.
Hope this helps.