So an update: on Monday, I went to the emergency room because my heart rate was fluctuating between 110 and 140 when sitting, standing, and walking. I checked my Fitbit and my heart rate seems to go from my resting (when asleep) instantly to the 100s range. I was having chest pain, difficulty breathing, and dizziness.This was similar to an episode I had on Saturday and felt I needed to get it figured out. I spent 5 hours in the ER but all the tests came back fine (even though I fell after I got a CT scan done). My ER doctor confirmed that all my tests were fine but agreed that something is clearly wrong and that the cardiologist wants to perform some outpatient tests. I was prescribed a new medication to lower my heart rate in the meantime. I reached out to my general practitioner and asked for a referral to an immunologist and another gastroenterologist since issues have returned. She submitted the referrals immediately and both specialists have actually spent time at the Mayo Clinic and consult regularly/submit referrals if needed. I'm feeling like I'm finally getting somewhere!