It sounds like you're under abusive management. If it's within your power, you should probably start looking for a new job. If you want, you should use some of those vacation days you have saved up to go on the job hunt.
Your mind and body need rest, you have a need for social interactions with friends and family, a need for at least 8h of sleep (see why we sleep) etc.
Your body is your ultimate manager because when at some point it says no, you’re out of luck and choices. Respect that.