How intense should the cries be during Cry it Out? I'm at a loss. We've tried CIO gently - going in every 5-10 minutes to reassure - but it just makes the next 10 minutes more hysterical. Basically my 8 month old has been screaming for 3 hours. He's fallen asleep twice for about 30-45 minutes each but then wakes up screaming. We've given him some tylenol because he has a slight cold, he is not teething at the moment, there is nothing wrong with him, he just wants us to hold him. He is FREAKING out though and just getting louder and more hysterical, not calming himself at all. I don't know how crazy to let him get.

I should add that this is a recent development this week. He's been sleeping through the night since he was 2 months old. HELP!