It certainly sounds like some elements are me/cfs.
And it can develop after a traumatic health event.
Short term memory loss and confusion fall under brain fog. This is a horrible part of the illness. It feels like how you'd imagine early onset dementia.
The extreme exhaustion is known as post extertional malaise. It might be worth keeping a diary and seeing what activities trigger this. At the moment it might be just getting on with life - the important thing is NOT to push yourself. Listen to your body and stop before you get tired. I can't stress this enough.
I had lots of dizziness when I first got me, but this has subsided now. Probably because I can manage the symptoms better (mostly!)
Pain is a common symptoms too. This is often widespread muscle and joint pain - that feeling life you've been hit by a bus that you get with flu. But lots of people also getting shooting pains.
The lack of sex drive I think is a side effect of everything else.
You can be prescribed drugs to help with the pain. I'm on nortriptyline which helps with the daily pain. It also helps you sleep giving your body more time in deep sleep which is when your body repairs itself.
It's a horrible, life changing illness that takes a while to understand how to live with it. The important thing is to rest as much as possible and not push yourself beyond what you can manage.
Have a look at the me association and action for me websites.