First of all, thank you for your encouraging words. It means a lot to us who are providing service specifically to covid patients.
Regarding your concern, post covid fatigue can stay for 1 - 2 months however it is not common at age 30 yrs.
You are doing all you should do for post covid syndrome,so continue to do same.
Just check your blood hemoglobin level, potassium level.
Next Steps
take
sugar salt water, coconut water if you are not allergic to it. Consult with the reports if fatigue persists.