Lord have mercy.
Most Holy Theotokos, save us.
Sleep does help to clarify and refresh one's mind, so do not neglect to have some sleep or you might make simple spelling mistakes like its/it's or their/there/they're. When I was writing my thesis, I would take small naps rather than going without sleep. Funny, I would proof my thesis while I was sleeping and wake up knowing exactly where an error was made.
St. Nectarios, pray to God for us.