Yes, candida and many other things can cause vertigo, and many "mysterious" symptoms disappear after microbiome rejuvenation. I think we are your best bet to getting back to a normal life to enjoy your family and your health. IF you end up in the candida plan and you don't experience a noticeable improvement in the vertigo within 6 weeks, then we'd likely add neurological supplements and gingko biloba along with balancing the ear crystals. That is coming at it from ALL angles.
You have ALL the symptoms of a nasty fungal infection that began as candida, then they excreted so much metabolic waste that it likely morphed to fungus, and maybe even to SIBO. The symptoms and toenail issues are TELL TALE. The longer this stuff stays in your system, the more toxic its metabolic waste becomes. It's as if you drank something as toxic as nail polish remover - and it begins to cause all kinds of crazy symptoms with its invasion.