@huima, first of all: Get better soon!
Thank you very much for sharing your experience. This is what numerous posters want to hear about: What happens when I get ill with Covid-19 on Camino in Spain? It is good to hear that you got help with finding a hotel room where you isolate and that the health service functions as promised and as announced. Would you mind telling which region you are in (Castilla y Leon, Galicia, other)? I'm just curious. You may know that the health services are organised on a regional basis in Spain.
I guess it was the owner or hospitalero of the albergue who asked you not to mention to others that you are infected and presumably infectious? That is not how it ought to be done but, on the other hand, nothing surprises me anymore.
Your experience - 3 shots with the last one in January and still getting ill with Covid-19 - is an experience that you share with many others. I hope that the thought is a comfort to you (and others) that in all likelihood you did not get as ill as you might have otherwise and that you presumably also lowered (not eliminated) the risk of infecting others. But that is just a thought, not an invitation to a major discussion.
Again, thank you for sharing and a Buen Camino continuation, hopefully soon.
PS: I guess that you are not yet in Galicia as you are paying for your hotel room ...