Just need a day off..

Has any other mom figured out how to work "sick days" into being a stay-at-home mom? I have had body aches and tummy aches for 2 days and am really struggling to keep going. I have a family member that has helped out and my husband came home from work a bit early today. I wonder if when those out there figure what salary a stay-at-home mom is worth if they figure in sick days or lack there of!