Rockleo,
I absolutely expect side effects. I hope that the myalgia and fatigue are signs of a robust immune response. Plenty of TNF-alpha and IL-6 to go along with development of anti-spike Killer T and B lymphocytes.
I get my second shot next week.
Personally I would start with Tylenol before NSAIDS. Likely a small effect, but intuitively is seems the inflammatory response is part of the adaptive immune response, which I don't want to blunt as covid immunity develops.
My employer instructs us to get the vaccine with at least one day off prior to returning to work. Obviously not a solution for all depending on their schedules, but better that being blind-sided as you were.
I hope the vaccine is highly protective for you as expected. We cannot afford, logistically or ethically, to have more good healthcare practitioners or fellow citizens, cut down by covid.
Be well!
Go CYDY!