I have been dealing with some very bad fatigue. I've had fatigue for a year or so now but since March it has gotten exponentially worse. I fear that I may be narcoleptic or have CFS.

I don't know if anxiety can cause this kind of fatigue or not, but I am convinced that it's something more. Everyday I wake up, no matter how much sleep I get I feel completely exhausted and it feels impossible to get out of bed. 8 hours of sleep or 12, I still feel horrible.

It takes me several hours to feel like a human  being. And then usually mid day I have a horrible crash. I get so tired and I feel dazed and confused. Almost like really bad dissociation. I can't think straight and I feel like I'm in outer space. This feeling usually fades in a couple of hours after it starts.

One thing that really scares me is that I can't exercise anymore. Anytime I try to do something physical like light cardio, it tends to trigger an extreme crash like I mentioned above. Extreme mental fog and sleepiness during the exercise. As a result I have stopped all physical activity.

I should also add that I have very severe anxiety. I'm diagnosed with health anxiety and before this bout I have worried about a plethora of different things. But this issue feels... different. I can't imagine that anxiety could cause fatigue like this.

I have talked to my doctor about this and am doing tests. I did a blood test which came back good and I'm currently doing an at home sleep apnea test. If this checks out we will go from there. For context I'm a 23yo male, 5ft 10 and athletic build. 

All day everyday I am panicked that I have cfs or am narcoleptic. I am so scared. I am posting this because I would like to know, has anyone else dealt with fatigue like this? And can anxiety cause extreme fatigue like this?
Thanks in advance