It could be allergies. Whatever it is, it's fairly regular. I have a once a day spike in symptoms, only at night so far, where I feel like I'm about the catch the flu (runny nose, scratchy throat, a bit of coughing, and generally feeling poor), but the symptoms fade after an hour or two. Besides that I just feel tired, and at the start of whatever this is I had a day of loose BMs. DW and I's family also started feeling crummy a few days after we did, which could admittedly just be a coincidence.
On the flip side, it's also fairly common to think the flu is just a cold virus or allergies because most people don't display much in the way of symptoms.
On the flip side, it's also fairly common to think the flu is just a cold virus or allergies because most people don't display much in the way of symptoms.
https://www.npr.org/sections/health-shots/2014/03/17/2908789...
Odds are this is just some random virus (>90% chance), but I wouldn't be surprised if it was COVID-19 either (<10% chance).
Edit - I also have a cousin living in LA that developed pneumonia, which again could just be coincidental.