Dwindling Motivation and Poorly Skippy Hearts

I am really struggling at the minute to even get through a day without wanting to nap or curl up into a ball and pretend the world doesn't actually affect me.
Perhaps it's because it's the holidays and there's nothing much to do although I have internship work to be getting stuck into and could/should be reading up early for next year's degree course.
Perhaps it's because I am perpetually shattered considering it's currently 2am and there is no hope of me being able to sleep due to my mind whirring like a machine this trend will likely continue.
Perhaps it's because you know what I am fed up of doctors having had 19 doctor/nurse/psych/hospital appointments since coming back home at the end of uni and I am weak and feeling oh-so grandly sorry for myself.

It's bizarre.
I have always been a hardworker.
Not even that, I've always been a work-herself-to-the-bone worker (yes I understand the cringe of the to-the-bone reference) and yet I've found myself so.....meh....about doing anything.
Then I sit here.
Lay here.
At night and mull over how useless I am for wasting a day.
A day that could be used to be a better person. A smarter person, a happier person, a prettier person, a more popular person. Somehow.
I have no motivation to leave the house.
Or to be happy.
Or to eat healthily. And with that I wonder why do I even need to care about eating healthily? Should I care about eating healthily? Is this a bad thing to care about?

I'm not even sure how I feel.
I hate doing nothing.
But right now I don't want to do anything.

The doctor fandango is exasperating. I feel like I get passed from person to person to person, and that more often that not they see eating disorder and blame whatever I'm seeing them about on that. I've now been given tablets for my stomach which has been causing problems for years now but I can't even motivate myself to take the pills. I'm still waiting for someone to take my heart seriously. It trembles and skips and flutters and pounds and pauses and tightens, not like panic attack palpitations, like it genuinely forgets how to beat properly. It does this for maybe 15 minutes at a time every few days. It's starting to scare me, but worrying about it won't help.