There's no herbal equivalent of Vagifem. Vaginal tissues get thinner, less lubricated and more delicate when there's less estrogen in the body (aka atrophic vaginitis, although that's not a very nice name, I think). The pain you have been having can be addressed through adding back estrogen or through other routes--your doctor prescribed one of the estrogen options, and if you want to use an herbal option you must know that it won't be directly comparable. Not inferior, but also definitely not the same. You could, for example, focus on strengthening or lubricating tissues, or maybe using soothing, moisturising preparations on the vulva.