I'm sorry, but I'm very skeptical of this, even though I too have had a really nasty head cold with post nasal drip, sore throat and swollen neck glands since mid February - not terrible in severity (and no fever), but lingering worse than anything I've had in many years.
Check out this article and video from the drive-through testing about 10 miles from me:
https://www.wcvb.com/article/drive-...s-hundreds-of-patients-in-single-day/31850939
In particular this quote:
"A few weeks ago, about 90% of people with COVID-19 symptoms tested positive for the flu. However, only 2% of patients at Saturday's drive-thru clinic tested positive for the flu, according to AFC Urgent Care." (The flu test is instant - the COVID test takes a few days).
I think there has been a very unfortunate combination of a bad late cold/flu season (post New Year) and now COVID coming on top of it - but I would be very wary of assuming you have had COVID unless symptoms developed in the last week or two and include a fever and dry cough.