I HATE that crash/overwhelming, incapacitating, leaden exhaustion more than anything! It has reduced my life to ~1/4 of what I used to be. It took 4 years to figure out what physical/emotional/cognitive things I can and can't tolerate and how much of each in a day or week. Tracking my activities and outcomes was the first step to understanding my current norm, then applying limitations and fine tuning my limits. And after that, well-life just happens and there are events that can't be controlled and all that goes out the window. Sometimes only my nose is just above water nd I can't catch up with life. Emotional therapy has helped coping with the feelings of loss, isolation, being misunderstood, and trying to stay on this side of hopelessness and being overwhelmed. Best to you as you navigate this!