Same here, I had both COVID vaccine and the flu shot on the same day this year. I ended up with a 102°F fever for ~24hr and had to skip work the next day. But unlike actually getting sick I felt 100% better the second day after getting them.

Moderna does that because it is a higher dose. Body aches, headaches means a robust immune response.

The last two times I've felt nothing and the common denominator was getting Pfizer instead of Moderna. Is it possible your pharmacy was out of what you usually get and had to use the other COVID vaccine, which your body may react to differently?

much better than getting the current covid which causes severe sorethroat, to the point the pain and swelling prevents swallowing+ constant upwelling of white sputum and coughing at the same time. i had that variant, and i was just vaccinated 2 months prior.

Huh, this is the first time out hasn't kicked me in the ass and I got them both in the same arm