I'm 69 and caught covid 13 months ago. It was a perfect storm with a 350 mi bike ride, little sleep, a cytokine storm from getting glutened (celiac), and a cyclist shared her covid with us. The long covid lasted 8 months (mostly cardiovascular and fatigue symptoms), but I still get a few LC twinges if I get really stressed. While recovering I exercised in bits followed by naps to avoid the PEM. My thyroid was also a bit sluggish so increasing my Synthroid helped with fatigue. Consider an elimination diet or keeping a food log in case covid resulted in any food intolerances. My celiac started 14 years ago; it was triggered by H1N1.