There has been 25 documented cases of COVID reinfection worldwide, so assuming you had it without actually doing tests is likely false. There are many diseases with similar symptoms in the upper respiratory system, and given no more than 25 people on earth have confirmed having it twice, unless you have positive tests Occam’s razor suggests otherwise.

https://bnonews.com/index.php/2020/08/covid-19-reinfection-t...

Hope you’re feeling better!