Baby won't drink bottle after vaccination

💓 • Momma w a 13 month old 💙

My 2 month old got his shots yesterday. Ever since then, when I go to feed him he's barely drinking anything, and stopping a lot while feeding. His last feeding he acted like he was in discomfort and was crying almost the entire time, this feeding he is squirming a little and just will barely drink. He normally drinks 5 oz and now he will only drink 1 or 2 and it'll take a while to get him to even drink that. Is this normal after they get shots? Or should I be concerned? Oh also he isn't running a fever or anything