Hello everyone! We got him vaccinated on Thursday, and since then he's…

Hello everyone! We got him vaccinated on Thursday, and since then he's been acting up. He's become incredibly fussy, even learned to cry. He's been screaming for three days almost non-stop, sometimes grabbing his chest through fits of crying. He wakes up and cries, although he used to smile after sleep and was even able to nap and lie down himself. Yesterday night he slept well as I've never seen before. Today, I put him to bed, but an hour later he woke up in a terrible fit and now won't settle down at all, only on my arms. I don't know what to do - vaccination, teeth, growth spurt? Has anyone experienced this? What did they do