given the acute onset... def sounds like parasites. We dont just "catch" candida as this is one of many different organisms present in our digestive tracts. Candida is more of a marker of a greater underlying problem and as stated usually goes hand and hand with larger intestinal parasites
like worms or flukes. So, to treat for candida might be treating the symptom rather than the cause. Have you run fevers... diarrhea.. nausea? Were your eosinophils elevated? These are a marker of acute infection but normalize over months which unfortunately leads many docs to mistakenly rule out parasites. Most parasites
do either one of 2 things, suck blood or glucose although some do eat feces, especially juvenile and larvae forms. If you had a very high infestation it could cause vertigo but also some of the parasite
byproducts (wastes) are toxic and can cause as much or more damage than the parasites
themselves (especially flukes). Crypto or giardia could cause profuse diarrhea to the point of causing vertigo but is less likely as acute long term dehydration would have you hospitalized. In either case, the crypto and giardia are commonly detected by stool analysis with antigen testing. The other parasites worms/flukes are not so easily detected although there is a blood test for flukes (fasciola antibody) that may be worth trying as well as for schistomiasis, not to mention Stongyloidiasis which is rampant in austraila. I would check to see which other parasites are endemic for that region. This is the optimal time for your diagnosis as your infection appears to be fairly recent and therefore the most treatable.
Best luck to you
PS incidentally I believe rabbitears posted an interactive world map of parasite