My baby will be 5 months old on the 2nd of January, he's so good and happy during the day, then at night, it's like someone flips a switch and he's SO fussy. He doesn't want to be put down, he doesn't want to stay asleep too long, doesn't want anything to do with tummy time or his play mat, only really wants me to hold him and even then he just keeps fussing. No fever, no cough, nothing that would make me think uh oh he's getting sick. I know he's teething, does it just hit harder at night? Does anyone know what else it could be? If it's teething what are some good/safe products for babies under 6 months?