I'm very sorry to read this, and I really understand it because I went through this, in my case I made the mistake of drinking alcohol because I didn't know it was covid, I thought it was a normal flu... and that made everything worse... in post covid I had the fatigue that you describe and a horrible suffocation, I felt that I was not breathing enough air into my lungs, I had to go for medical check-ups and my lungs were like those of an asthmatic, quite damaged... they sent me a treatment and I was able to improve them...
I also had an inflammatory response in my heart, I got mild pericarditis, which could have worsened if it had not been detected in time...
On a mental level I was left with anxiety that I still struggle with to this day, when I feel drowned I get panic attacks, I had to go to the psychologist to deal with it
And all this was due to the covid that gave me...
That sounds horrible! I'm sorry you had to go through so much. 😱