I got my second shot about 18 hours ago.
My shoulder started getting sore roughly six hours into it, and it's still a bit sore, but I can move it freely. No bruise either.
Aside from that, I've been a little bit tired, been getting tiny sporadic chills, but aside from that, I'm all right. It's mellow. I'm in my mid-30s so I wondered what it'd be like.
I'd assume that this is going to be the worst of the side effects since I'm almost a day into it.