Have you talked to your doc about how you feel come 11 pm? Is it possible that the fatigue you're feeling is caused by something else? Is it possible that you're overtraining? Not enough food or hydration?

I do know what you mean about forgetting what normal feels like? I felt that way most of last year as we tried to regulate my thyroid levels. It took over a year to get them back to normal and I'm not sure how long before that they were abnormal. Several years perhaps? I was mildly hypo for several years before becoming hyper, but I didn't know that at the time because none of my docs thought to tell me that my TSH was over 3 and sometimes over 4.