I also am an RN, working with child and adolescent psych outpatient. I experience daily brain fog, difficulty with focus and recall. I experience with retaining information, finding myself writing EVERYHING down. So far, employer is very helpful and understanding. I have developed a significant murmur, rapid and irregular heart rhythm. I am getting a heart monitor today, failed pulmonary testing, and scheduled for a CT if the lungs next week. Hang in there. We will get through this,