Funny I just saw a TV program discussing long covid. One of the guests was Jördis Frommhold who was elected woman of the year in Germany for her work on long covid rehab. Very interesting discussion.

One of the things she mentioned is that many of the long covid patients had mild to moderate covid infections. Also at the moment they don't know why some people get it and others don't. So likely your not calling the ambulance did not make a difference.

Hope you'll get better, the symptoms described sound awful.