Candida yeast fungus pin-prick blood test (No invasive phlebotomy needed!)
Candida

Candida is a yeast that in health does not cause a problem. If you are run down for any reason it may become establishd and can take hold and make you feel unwell. 
Candida is a yeast-like fungus that is normally present on the skin and in mucous membranes such as the vagina, mouth, or rectum. It is also a normal inhabitant of the human gut. However, when a person becomes dysbiotic, Candida can morph to become a pathogenic (injurious) invasive fungus and give rise to Candidiasis which is caused by over growth of Candida, predominantly Candida albicans.

What are the symptoms?
Candida overgrowth can cause a variety of symptoms including: 
A short list of common symptoms:

Fatigue
Weakness
Muscle & joint aches
Headaches
Feeling of being "hung over"
Gastrointestinal disturbances - diarrhea, constipation, nausea, bloating after eating
Psychological disturbances - depression, anxiety, irritability, mood swin