I have been having heart palpations, shortness of breathe, muscle weakness in lower extemities, chest discomfort, a rash,sinus problems since November. Saw allergist, cardiologist, Ent. Some symptoms better with anitobic, steroid and nasal spray/ inhaler. Could it be a autoimmune disease? Because what bothering me the most is the constant cracking of my sinus, daily palpations and chest discomfort with muscle weakness. I had a baby last year and exposure to mold as well.