Hi, Stressedlpn, I'm Sleepyeyes, and I too, am a workaholic. I "had" to work all those hours to pay for tuition. But after I got outta nursing school, I started this self-care technique so I didn't burn out, and waste a perfectly good body, marriage, and mind.
Here's what worked for me when I was so exhausted I just had to scream:
Take a couple of days off....and spend at least one of them in bed, resting your body. MAKE YOURSELF DO THIS. soak in a hot tub and go back to bed. You've earned it.
The second day off, plan a more human schedule and stick to it. Practice saying "no" in the mirror every day before work, so you don't get sucked into that extra shift.
The next time you're asked to do anything that will total (including staying over to "finish up") >46 hours/wk, say no. And don't let 'em wear you down by asking you when you're too pooped to protest.
Stick to it by screening your phone calls. If it's the job DON'T ANSWER. Give yourself a couple hours to think about it first.
(I had to go so far as to trust my husband to tell me if I was tired or not-- I hadn't listened to my body screaming for so long, I could only tell by how irritable I got at home.
...and remember, it does get easier. The money is not worth YOUR quality of life. I do about 45 hours a week (because I inevitably get stuck doing that 7 am admission or whatever) and I'm a much nicer person and more alert nurse for it.