ahhh I remember days like that... years actually, although i carry different stress around this year...
...but, I can say this, you can only do so much, and you can only get it done so fast, and you can only make so many sacrifices before there's nothing left to give... so you have to know when to say when.. and if you ever don't say it when you should, but you realize you should have said it... sub it out... give up the profit just to get someone else to get it done for you... if you shouldn't have taken it, or can't properly & promptly get to it... it's profit you're not meant to have... but don't lose too much sleep to meet your commitments without at least considering farming out something to take a little pressure off...
hell, I worked till 3 myself last night, slept less than 5 hours & went back into the fray... I've pulled all-nighters at least once a month for 10 years, working 'till sunrise... so I'm not saying not to work your ass off... just saying don't be afraid to get out from under a little stress now and then, if you pile a little too much on yourself sometimes... you're allowed to, that's all I'm saying... get help when you need it!