It is true that yeast and herpes can cause similar symptoms in women, and the timing of your apparent yeast infection would suggest the possibility of herpes. That said, if your symptoms are typical of yeast and no different than previous yeast infections you have had, that's probably much more likely than herpes; and the response to fluconazole (Diflucan) favors yeast, even if not complete - you're right that it takes several days for symptoms to resolve completely after yeast treatment. Finally, taking prednisone indeed can predispose to yeast infections, but not herpes. Finally, usually herpes would cause specific sores.
So it is a judgment call as to whether you need herpes testing. If you happen to have a positive HSV-2 result, it won't necessarily mean herpes was the cause of your symptoms. Type-specific HSV-2 antibodies usually are present by 6 weeks after infection, but it takes 3 months to reach 90% reliability--and sometimes longer. If you pursue herpes testing, probably best to wait 3 months.
If your symptoms reappear yet again, however, don't assume anything. See a health care provider right away, before you treat yourself against yeast. Most likely yeast will be confirmed, providing reassurance against herpes. And if you indeed are one of those who gets recurrent yeast--whether or not due to steroids--your provider might give preventive treatment. For example, some women in that situation are advised to take fluconazole once a week on a regular basis.
Good luck-- HHH, MD
we are wondering if this could be a bacterial infection, yeast infection, lichen etc
please help us
My bumps are nothing like hers. We compared and she told me that hers never ever looked like mine do. Mine pretty much seem like there going away. I have no swollen glands or anything.