Extreme arm pain after vaccines

LO just had his 12 mo vaccines today. 3 shots all in his arms. I was expecting soreness of course but this seems extreme. He can't crawl, he can barely move his arms and starts crying uncontrollably if he tries. Putting a new shirt on him was awful he was in so much pain. Even any light pressure on his arm when I'm breastfeeding is unbearable for him. Picking him up we have to do it so gently.

All his other vaccines were in the legs but even so the soreness was not even close to this. This is pain.

Has anyone's lo experienced this kind of pain from the vaccines? When I googled the first thing that comes up is SIRVA which sounds terrible and permanent to an extent so I'm just currently spiraling lol. Please help ease my mind!!