I have sleepiness every so often where I have to lie down and sleep or I'll fall down! It usually only lasts the one day. I have fatigue most days but I handle it by doing a little then resting a little. You can't over do it!
Be kind to yourself. The housework will still be there tomorrow so just plan your week by doing doing a little each day. If I over do it then I have rest for one or more days!