hi, been diagnosed previously with CFS since "nothing" was really found back then, things have changed since. But in short, nothing really helps me, stimulants do, but its not sustainable. But for me muscle relaxers make me way worse....
There is a strong correlation with people who complain about CFS symptoms and those with both sleep disorders and things like Myastenia Gravis. I was diagnosed this last year with Narcolepsy through a MSLT sleep study (all naps were positive for short REM). As for the fatigue, I have also developed more alarmign symptoms I am under evaluation for MG, waiting on blood results. I found that stimulants help me to keep it together a little (used for the narcolepsy), but I am still struggling with the fatigue otherwise, because the stimulants keep me up for a period of time, but it cant be sustained, so I crash and crash really hard into severe fatigue. I also found that I am reacting negatively to muscle relaxers to where I get my weakest.
I recommend getting a sleep study and going to a neuromuscular specialist, as MG is fleeting and not so easily diagnosed. There are blood tests that can detect abnormal antibodies in people, but is not always telling, as there are people who are sero negative. Get tested for acetylcholine receptor antibodies and anti-MUSK anti-body at least and when you are in the worst fatigue, go to a doc who can do an EMG on you then, because MG changes rapidly, also take a picture of your face or have someone do it and show it to your doc.
Overall, sometimes people have overlapping conditions that produce the total CFS picture, but they are not always correctly and expediently diagnosed. So you never really know if its CFS. All you know is what improves or makes it worse.
CFS is difficult, because the only way to really? diagnose it correctly, would require genetic testing, and there is still alot of information being discovered about this illness and what the clear indications are for diagnosis, especially as it pertains to diagnostic testing (if that even exists). Good luck.