My son is four months old and still hates tummy time. Even with toys and me down on the ground he’ll do it for a couple minutes before getting fussy then screaming after about 5 minutes. Does anyone have any suggestions? I can’t do 6 5 minute sessions every day because I can’t do it for two hours after he eats or he spits up a lot and gets the hiccups and he only eats five times a day