My baby will not go to sleep. He will comfort suck for two to three hours but I've had to stop this as was making me sore. Currently I am trying to rock and shush him but he cries for up to three hours every night. I feel like I can't comfort him and that there might be something wrong with him because he just can't relax. He always seems manic even after a very calm relaxing bedtime routine. Putting him down sleepy is a joke as soon as I unlatch him he shakes his head and kicks until he's wide awake. I've tried putting him down awake at the first sign of being tired but will just wings turning into hysterical crying. He is three months old and I'm just scared and desperate.