I would investigate Lyme disease and other tick borne illnesses. The disease Babesia comes to mind. It causes night sweats and "air huunger".
I have this illness and it causes a lot of palpatations, fatigue, chest pain and chest pressure. check it out. It is related to malaria and can be transmitted by a tick bite
Chronic Lyme Disease,Fibromyalgia, CFS, PCOS, sleep apnea, hypothyroidism, type 2 diabetes, bulging discs to name a few