We had a couple tests that expired last October. Used them this week when we suspected Covid and all tests but one came back as positive and that’s the one I used on the morning of Easter Sunday when I noticed a tickle in the back of my throat. When my symptoms started getting worse that night, the second test in the kit showed positive.
You must have recovered very fast.
I was mandatorily tested twice last year, in a 7 month period, with the rapid swab tests prior to having procedures done, and tested positive twice. Had no symptoms whatsoever either time. Had to postpone my cataract surgery in November last year because of the second positive test. The same day I went to the facility for the rapid swab test two days prior to my cataract surgery, a brand new rapid home test showed me as negative earlier that morning. New York State won't let you submit a home test result unless you've gotten the shots, which makes no sense to me. The tests aren't accurate...never were.