My company is based in SF and they tell me that if you show up at pretty much any site an hour before closing you can get in. The combination of missed appts (20%/day avg) and perishable product means they'll stick ya.
I got the second dose of the Pfizer vaccine. Felt shitty for about 24 hours (low grade fever, chills, fatigue), but then it just went away. Not really that bad since you understand what's happening and it goes away quickly.