First off, (((Unagie))).
I get the tiredness, the complete physical and mental and emotional exhaustion. And its OK to feel that way, just don't let it take you over. We're only human, we can only take so much, I think even though you're exhausted hun, you are still managing to recognize little things that dragged you down that wayward path before, but that's it, that's the huge difference between now and then! You recognize the pattern, and are not going back there!
I hear ya about the responsibility and lack of sleep, I think most nights I manage 5-6 hrs, broken up over a period of 10hrs... and the worst part about that whole cycle is the missing sleep. It just magnifies everything 100x!
Is it possible for you to get to bed a little earlier and spend some quiet, restful time, even if you aren't asleep, just at rest. Just some time to relax. Make a hot cup of tea, put on some fuzzy PJ's and close your eyes. Find a time of peace in your life and focus directly on how you felt at that moment, and take deep breaths. Deep breaths always help!
I'm sorry you're exhausted hun! You're going to be OK, its just so hard to see out when we're stuck inside that mindset.
IMO, sometimes you need a little pity party, just make sure you don't let it turn into a bender.
Card, I need to apply that HALT principle directly to my life! Thank you!