So glad bro, did the fluid problem disappear totally ? After I had Covid, I tested myself out by walking 4 miles. I checked to see if I could handle it (post-Covid). The incessant coughing (9 days) had me worried that I wouldn't be able to perform physical activities or exercise in the future. This was about 3 weeks after my symptoms disappeared and I thought it'd be safe to go out. Felt good, didn't have to stop. Wasn't gasping for air. Also, a friend of mine is experiencing post-Covid brain-fog where he has trouble focusing and concentrating. Not to scare you but these and other lingering effects are real and you should watch for after recovering. Go to your doctor, get yourself a complete check, heart, lungs. If doctor says it's unnecessary tell him HE is unnecessary and get a new doctor.