I totally identify with everything you've described. I'm also starting to think this approach is not healthy, as I am exhausted on my way back home. Thanks for writing this, as it perfectly describes how I am feeling right now.

Word of advice - get some sleep tonight. Not every night, but at least tonight. You can't do this to yourself every night. Force yourself to get to bed before 11pm. Your health and your family are more important than your startup even if you have an illness.

I went to be at 1am last night, but tonight I am calling it early. Or at least I am going to try.