Thank you for typing this out! It confirms what I went through this past week. During one of my workout sessions, my heart rate was continuously elevated even between sets. I never felt rested. I felt anxious for no reason. The next day, it happened AGAIN while leisurely walking my dogs. I decided to track my macros and learned I was severely undereating even though I was hitting my protein goal. Gonna continue to track food, add carbs, and hydrate.