My LO will be 3 months in 3 days and for some reason today I am feeling like he isn't hitting his milestones. He still hates tummy time and doesn't try to push himself up at all and he really isn't bring toys to his mouth to chew on them. He also has stopped trying to roll over. Is this normal? He loves to try and sit up and stand, he'll hold his toys for a least 5 mins if you put them in his hand and for the rare time he is okay with tummy time he tries to push himself forward.