I have donated platelets and whole blood at One Blood in June and July of 2020 and have had four tests for the Corona Virus antibody. All of these were negative.
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If you can donate blood and need a Corona Virus test you might consider this option and during these months have had to only wait at the most 4 days to get the results.
I wear a mask whenever in social situations where I might me six feet of closer.
If in an wide open space with a lot of opportunity to keep a good distance from people-- like at a large dog park-- I do not wear the mask but try to keep track of places I have touched and to use the hand sanitizer when needed.
If One Blood is not in your location you might want to consider some other blood donation gatherer like Life South, the Red Cross, etc.