@mkqq's very frustrating to me if I've not felt well, or have been pretty ill like you have been not to know the cause.- This is the sad thing about COVID-19 unless you have a test, and it's reliable than you won't know. You could have had the flu, pneumonia, bronchitis or COVID-19. I suggest not paying attention to when symptoms have cropped up, each person is different. It's rare but you can have pneumonia without a temperature. It sounds like you are doing very well. Biking uses up a lot of energy so your fatigue seems better too. What are your main concerns?