I also suggest strongly that you talk to your doctor.
I had Covid back in March of 2020. Now I still get suddenly very fatigued if I over do things. I got my sense of taste back fully about 3 months ago. My lungs cleared up after 5 months. My husband and I caught it when he was teaching class for some students from a foreign country. They all became ill too.
See your doctor. See if he recommends taking supplements.
There is something that is called a covid long hauler, which means that even after you have "recovered" from the virus, you still have lingering effects from it. These symptoms seem to vary from person to person, but definitely include problems breathing and fatigue.
No one knows yet how long they'll last, or if it's permanent. Have you seen your doctor? You might have some lung damage.
I'd see your doctor and ask to be referred to a specialist. Good luck!