My baby has always been slightly fussy around his bed time but just feeding him well would put him to sleep immediately. Since a few days, he’s been crying a lot! He just cannot stop crying for hours like he’s in pain or something. I took him to the pediatrician but she said it’s a part of his sleep regression but I’m not too convinced it’s just sleep related. I don’t know what to do! My husband gave him a bit of gripe water today and he slept really well. Can colic start at 4 months?