I do feel for you Adah.
Personally my Head Spinning, Brain Fog, Headaches may or may not be Candida related. I do get them these days about an hr after I wake up & usually they last till I go to bed at night. I am going for a Head MRI early next month.
A part from Bad Candida & a digestive system which is just not functioning I can also not sleep at night without Prescription Medication, got diagnosed with severe sleep apnea.
Logic tells me that the Headaches etc are Candida related but still have to be sure.
My advice would be to still have yourself checked out thoroughly just to be safe.
Anti Fungal wise you can start with one like Oil of Oregano or Thyme & rotate them on Bi-weekly basis.