Just to report back that I'm doing fine after getting my covid booster. I got the shot Friday night, and my arm was sore shortly thereafter, but less so by Saturday night than it had been in the morning. At the same time, my underarm/lymph node area became sore and tender, and is more so today, which happened last time, too, and does not worry me. There goes my immune system, practicing what to do if the virus finds me! Come on, little immune system, be ready! Go go go!
Ahem. I might be a little excited. I can't fully express how grateful I am that scientists had been working on the mRNA vaccine technology for years before covid came along, so that they could make these vaccines happen so fast. If we'd had to stay in and do nothing for years, I would have lost my mind. I'm still being careful, but largely so that if I get infected, I don't give it to anyone who can't get vaccinated; they're the ones I worry for.
For me, as my doctor said recently, if I get it now, it's most likely to be an inconvenience, nothing more. Vaccinated, I am far less likely to get sick; far less likely to get seriously ill; far less likely to be in intensive care or need a ventilator; far less likely to die. A sore arm and tender lymph nodes are nothing compared to all those things.
If you can get vaccinated, please do.