Welcome to the Candida Albicans Health board!
I am sorry about this. To find out there is a test that can be done called the Candida Albicans antibody titre.
blood test. A culture might not find it because the organism is not always in the blood. In the case of body substance swabs the organism may dry out or die from a cooler temperature before it can be cultured.
In the meantime I would keep it cool, dry, expose it to light and I would not allow the skin patch to rest on surfaces that would allow the moisture to stay, such as resting the arm on a table surface. Eating sweet things will also allow the organism to grow and or get stronger so I would avoid sweets.