My LO is 3 months old (7weeks corrected) and for the last few days has started frantically trying to put his hands in his mouth. He hasn't looked at his hands at all, so unsure whether he's truly discovered them. He's going through an extremely fussy phase the past week. He's trying to shove them in his mouth in a panic, but then gets so frustrated with it as he can't do it properly yet! He also constantly wants to be held and he's also refusing feeds! The only way to feed him right now is to do it whilst he's drowsy/sleeping. He's also constantly wanting the dummy but still tries to chew his hands even with it in. I don't think he's teething. Is this just a growth spurt?