My daughter and her almost-2-yr-old and the father moved in with me in late December. In mid-January, MLK weekend to be exact, we held a garage sale to help get rid of the excess stuff they brought.
I saw at least three people wearing surgical masks as they browsed and bought. I helped two men load up an electric piano which they said was going back to the PI for a church there.
About 2 days later, I developed symptoms. Fever, deep mucus-producing cough, tightness in the lungs like when the VOG rolls in, a sore throat, runny nose, etc.
Took me about 2 weeks to really get over it. Went though lots of NyQuil Severe Cold & Flu liquid, Muscinex, cough drops and Kleenex.
Since the COVID virus takes a couple of weeks to present symptoms as far as we've been told, not only was the garage sale too close to the onset, but all 3 of those in my house never complained of a single symptom.
My diagnosis was I had the regular flu or a bad cold. Most likely I caught it from someone at the 3-day yard sale.
Then again, it could have been something I picked up at Costco or Walmart. Unless you can pinpoint the moment you came into contact with an infected person, there's really no way to do much more than make a list of possible places you contracted it.
Did I have Covid?
Maybe.
Do I think I had it?
Only an antibody test can MAYBE answer that. Even if that's positive, it's still just a guess given the details I laid out.