So happy to find this! Have had a terrible weekend and came over to General Health in the hopes of finding a fatigue support thread, and here you are!
And glad your namechange didn't work fuzz, as I remember you from previous threads. Don't know if you remember me, as most of our interaction was from a previous name, but I have seen you in this name. Sorry to hear things aren't going well right now :( 
Anyway, I haven't been properly diagnosed with anything, but I am under the care of the local ME nurse and he said he'd write up a diagnosis of CFS if I needed for work. I also have known I've had an 'unspecified dysautonomia' for about 10 years now, and only last year did I find out that the Dr who diagnosed this and gave me meds which have enabled me to live an almost normal life over the last decade suspected POTS. I've spoken about this with GP and we're very slowly working through tests and stuff (with a distraction, more below), after having been blown off by the fatigue clinic he referred me to 3 years ago (they said I had Depression, and that there 'was nothing physically wrong with me', never mind that I have to take medicine for the rest of my life just to simply operate...).
Although the new weird thing going on with me is that I am having a terrible time eating. I can't eat in evening at all, or I feel desperately ill, and it's been moving slowly earlier and earlier into the day. When it started I could have a normal breakfast and lunch, but now I can only eat a half-sized lunch and a normal but small breakfast. I've had some blood tests and an endoscopy, and they've found nothing wrong. The interesting thing, though, is seeing how HCP's actually pay attention when you start rapidly losing weight! When I first saw the GP I had lost 10 pounds in a month. It's now over 30 in 3 months. It's a different experience than having to argue about how my fatigue is a real thing! I must say things don't move much faster, but it is a nice feeling to actually be taken seriously.
Anyway, this weekend has been a nightmare as I've basically worn myself down over the last several weeks and yesterday I had several boughts of just bursting into tears because I was so exhausted and falling down and stuff. I'm fighting off a cold that DH has. I'm taking the day off work tomorrow (mostly, will do a bit from home), in hopes of getting better and not getting sick, as I have mandatory stuff and busy days Tue-Fri.