yesterday i went out and my baby was hungry so i have him a bottle but when he was half way he…

yesterday i went out and my baby was hungry so i have him a bottle but when he was half way he started refusing the bottle and was crying. He was still hungry though. I figured i had to let him relax and we went into the store and it seems like it worked. But ive noticed that since yesterday he hasnt been wanting to eat as much. All he wants to do is sleep, im putting my breast in his mouth but he's just sleeping and he has only pooped 1 time since last night, 4 wet diapers. Should i be concerned and what could have caused him to be fuzzy all of a sudden? I need him to eat since he is jaundice, its getting better but i dont want it to get worse😔