My 1 year old has not slept through the night since he was born. Though he goes to bed at a decent time (8 PM) he wakes around 3 AM every night. I've held him, rocked him, tried just rubbing his back, and more, but the only way I can calm him down is with a bottle. Our doctor suggested just letting him cry it out for a few nights to get over this hump. According to the doctor, he is in a routine now and that routine needs to be broken. I'm willing to give it a go, but my husband is hesitant. Is it really that bad to let him cry it out?