That really is horrible & unfair, but at least you know & you've been doing all the right things, so hopefully you'll be back to full health soon. Don't overdo it, though; we don't want you to be knocked out for even longer. Enjoy the Mac in the meantime.
First log from the new Mac right now! =) Was fun walking around today, will check in if it wipes me out for tomorrow or raises resting heart rate. Sure I will sleep well tonight though!