help!

my son is 4 months old, he got his 4 month shots and ever since then he won’t calm down! non stop screaming for hours! i gave him tylenol, rub his thighs, bath, soothing music. i’m at my wits.

what can i do?! he’ll be fine for 5 seconds then starts screaming his head off. i need help.

why’s he doing this? is he teething?! was it the shots? sleep regression? how long is this gonna last? please tell me i’m not alone ☹️

update: he got his shots friday! i forgot to mention