I had the same symptoms, I suffer from a chronic wandering mind, likely to start experiencing profuse sweating, headaches, and rapid heartbeats when anxious; it does not happen that often, but it is hard to stop when it does. I think it has something to do with stress, as it occurred to me. https://mangoclinic.com/an-ultimate-guide-towards-your-recovery-from-depression/I tried some tips that helped me to prepare for a profoundly sustaining practice, don't give up When you feel like all your energy is drained, rest. When moments become more important than a detailed plan, enjoy them. When your body changes with each season of life; listen to it, nourish it, and respect it. When you start to question your worth, remember to be gentle with yourself. You are doing the best you can, with what you have. Look how far you've come the past years, you are never starting over but instead relearning everything you've gained from experience.