Same, I had it starting January 4th in the SF (North) Bay Area, I'm about 90% sure.

I was probably basically a super spreader too, tbh. I went to work every day, 'cause I tend to power through whatever is thrown at me. At least I avoided shaking hands.

People were even talking about it back then... they didn't know it was Corona, but friends I know who are nurses were saying there is a "weird, bad respiratory infection" going around, and a lot of "atypical pneumonia" and a "really bad flu season but it's a weird flu".

We already had it weeks and weeks before the shelter-in-place in the Bay Area, I'm very sure.