Beau lines associated with COVID-19

I noticed a Beau line running across my left thumb nail during the first week of August 2020. I could not remember injuring my thumb in the preceding weeks so didn’t think too much about it at the time. On Aug 26, 2020, I went for a Covid-19 test because I needed a negative Covid-19 test to visit my mother-in-law in a Long Term Care home. My test came back positive and I was surprised because I had never experienced any symptoms. Because I had no symptoms, I had a second test on Aug 29, 2020 and it too was also positive. Later I wondered if there could be a correlation to Covid-19 but I couldn’t find any references on a Google search. I did take 3 pictures of it on Sept 2, 2020. I have just recently completed 14 days of self isolation with no symptoms. In addition, my wife and all of the personal contacts I had from before Aug 1, 2020 and up to the time that I had the positive test result, have all tested negative.