I am not COVID-19 positive anymore.
Can't say it was very light - I was literally off 2-3 days, then it got better gradually. I followed my health stats from my watch, mostly with resting heart rate and stress metrics from my Garmin Fenix.
I was feeling perfectly fine during the incubation period, but my RHR was clearly over the average. As a software person, I like digging the data. "stress" metric is also similar in the same timeline.
Seems like smart watches tells a lot about your health.