@solterra Hello & welcome. So sorry you are struggling with this. My daughter, presumed Covid-19, has had 2 relapses. One at 14-15 days, and another at about 30 days. Her symptoms were not as severe as you report, but she still is experiencing frequent fatigue at nearly 8 weeks. Her pulmonologist attributes it to a compromised immune system (she is on immunosuppressant therapy for severe asthma.) It is frustrating for her, as she is an active athletic person who normally works full-time, volunteers, and goes to school online, and now she needs to conserve her energy carefully to get through the day. She has not been allowed back to her job as an ER nurse until it is known that the antibodies confer at least temporary immunity.
I hope you get some answers from your appointment.
Sue