And in the Middle of the Night

I count myself lucky to be blogging right now on my beloved Chromebook while I'm working an overnight shift at my job. I impulsively agreed to work a second shift, partially hoping that I would get some writing done during the graveyard shift.
There's wi-fi on my unit, but the password is a ridiculously coveted secret, and one of the supervisors (who likes me and knows my work ethic enough to have confidence that I wouldn't abuse the wi-fi and would still do my usual diligent work) entered the golden password into my Chromebook one evening, and voila! I have access in order to transform my boring downtime into valuable productivity. Huzzah! I'm not being sarcastic. Having that possibility opened up to me seriously felt like Christmas morning.
Thus.
Having it with me tonight ended up being the deciding factor in my staying for third shift.
Here I am; I finished my paperwork and am now freed up to work on my novel.
Aaaand nothing is happening. I brought my outline, and I even began a brainstorm and list of characters. I was ready to dig in, and then all of a sudden my accumulated fatigue came upon me like a heavy blanket, and I can't stop thinking about blankets and pillows.
This is why I stopped picking up overnights for a while. I love the quiet and the downtime (I can basically watch Netflix the entire time), but holy crap I'm just so tired the whole time. I'm hoping, however, that my recently shifting sleeping habits would aid this. Lately, I can't even sleep until almost 2am, I usually wake up anytime between 4:30 and 6:30 and I'm unable to go back to sleep for at least a couple hours, and then I can easily sleep until at least noon. It's random, inexplicable, and frustrating. Because of this, I have decided against picking up first shifts as my extra shifts and try overnights again.
Also.
Administration just raised the differentials for second and third shifts by seventy-five cents, so that will be helpful to my financial goals.
I'm honestly just rambling in this blog post to both get my writing juices flowing and to stay awake. It's 3am. I'm only halfway through. If I'm not able to get right to sleep when I finally get to bed, I'm gonna be super pissed.
If I worked harder on my self-discipline with working out and writing, would I be less likely to fall into my depressive lows, I wonder? Would I be further less likely to fixate and hyper focus on my romantic life because I would feel more self-satisfied?
Do I need to be on my own, or do I need to push through everything and finally settle down for real with my boyfriend? I like how close we are and how well we get along, but I want to be single. I miss my independence. That's the truth.
I'm developing a headache from fatigue. I'm wrapping this up and I'm going to force out some words for my novel. Here's to more overnights and writing sessions!
You read this for some reason, and I thank you. God bless!