Decided to switch up my excercise and joined an indoor water aerobics class. It is in a small room, very warm and humid and the pool was like bath water. I made it thru the hour class but felt wiped out the rest of the day. Heart rate and bp ok when I got home. In the class I felt claustrophobic and warm, kept thinking some cool air would fix it. Cannot decide if I was having a physical issue or just anxiety. Im not on any meds, exercise in a cool gym without problem . Last a fib was in sept, been feeling great. Any thoughts? Im not sure I want to go back.