I believe my 6 week old son is going through a growth spurt-for the past day and a half he hasn't gone more than 2.5 hours without eating, mostly going 1/1.5 hours between each feeding (the 2.5 last night-THANK GOODNESS!). I think this is a sign of his going through a growth spurt. However, he seems to be spitting up a lot after the feedings since he's been eating so frequently. He doesn't typically spit up and when he does, it is VERY infrequent-not even daily. Any ideas what is going on???