Just live the life you want to, work the hours you want to. Make you and your own health the priority, and do work second. Let things fail at work, let projects be late and the answer as to why is "it was more work than I could do in the time alloted". Then, how they handle it will be the test as to if you stay, or find another job that respects you and your health. If they say ok, well add more resources then it's Okey dokey, if they say "nobody cares, work harder" find another job.

Edited to correct a typo