What else can be wrong in little baby life?

We've had a relatively easy time these first 2weeks with our little one but today out of nowhere he won't sleep! Was giving a solid 2-3 hour nap up for 45 minutes to change eat and snuggle or play and back to sleep. Today 7:15 changed ate 2oz snuggle fell asleep and then woke up again by 8, changed ate 1oz fell asleep woke up again at 9. Changed he went through another 2oz fell asleep on me and I let him lay there about half hr instead of putting him directly in his crib, put him in there , woke up 15 min later. So now 10:15 changed and ate another 3/4of an oz fell asleep eating , laid him on the bed next to me , slept for half hour and then 15 min in his crib , now 11:15 changed, offered a bottle he refused, fell asleep on me and laid him down again at 11:40, up again at noon. He's dry, doesn't want the bottle screaming as soon as I put him down.. What the hell happened , what am I doing wrong ? What can I try ? He's been PERFECT for 2weeks and we haven't introduced anything new since day 3when he got on this formula. He's also not spitting up or gasy.. it's now 12:30 I've just been letting him cry it out for the last half hour