I have been really sick for almost three years.how can i tell if it is a fungal infectionthat has spread literally all over my body. included also now into my eyes?have white hairs that started popping up on forehead aft. infected yellowish scalp etc?

This is unlikely but something you can find out by listing all your issues with a timeline & taking that list in for an evaluation. If fungus gets in your blood you are likely dead within days. On the body surface it would have physical findings. Yeast is normal in your gut. You may have a chronic illness but the what & why requires an evaluation & likely testing.