Actually, you are likely taking the fludrocortisone for your Adrenal issues, which can affect your POTS.
The WBC is low due to the infections you have. Two of the causes could easily fit your situation:
*Overwhelming infections that use up white blood cells faster than they can be produced.
*Viral infections that temporarily disrupt bone marrow function.
www.mayoclinic.org/symptoms/low-white-blood-cell-count/basics/causes/sym-20050615The IGE, if I'm understanding right, means you have allergies.
"Immunoglobulin E (IgE) are antibodies produced by the immune system.
If you have an allergy, your immune system overreacts to an allergen by producing antibodies called Immunoglobulin E (IgE). These antibodies travel to cells that release chemicals, causing an allergic reaction."
www.aaaai.org/conditions-and-treatments/conditions-dictionary/immunoglobulin-e-%28ige%29.aspxWhile the above site mentions only symptoms in the nose, lungs, throat, or on the skin, this site says that IGE can also be from food allergies, which some of us develop when we get the gift of Lyme that keeps on giving.
![eyes](/community/emoticons/eyes.gif)
"A true food allergy is triggered by IgE antibody production specific to a reactive food. IgE reactions generally occur within minutes of eating a reactive food, which is why they are also called ‘immediate’ hypersensitivity reactions."
rmalab.com/medical-laboratory-tests/allergy/igg-food-allergy