After feeding, he constantly wants to throw up, he puts his fist in hi…

After feeding, he constantly wants to throw up, he puts his fist in his mouth, causing vomiting, I take my hand away and he screams, after regurgitation, I put him on the bed and he screams, then he still wants to vomit and so on endlessly until he falls asleep, he has diarrhea, yellow or green, became very capricious, restless, only on hands and sometimes even on hands he cries, throws tantrums, he even cried during colic, tears flowing, it's hard to calm him down, he used to react at least to voice/grumbles, acquaintances say that maybe teeth have started, what could this be?