I think you're probably right. And actually my above statement is incorrect, I was unwell for a few hours about 5 months ago. Woke up at about 5 am with flu-like symptoms, chills and muscle pain (but no cough), I couldn't get out of bed, even reaching for my phone was a challenge. At about 11 am I started to feel better, at noon I was up, felt a bit tired all afternoon and in the evening I felt normal again. So perhaps I did briefly interact with Covid.