Vaccine

My 3 month old boy had his pneumococcal and rotavirus vaccine two days ago. He had mild fever yesterday and now his body temperature is back to normal. His feeding has become lesser than usual even though he no longer has fever - seems like his appetite has taken a dip. Due to lesser feeding, I think his tummy becomes gassy or has wind and he cries murder in between feedings. He refuses to drink milk when he cries. Any mummies’ little one facing the same? Is this normal?