Ryn - it sounds like he has "colicky" symptoms (sorry if this is something you already know) as to me it seems most unusual for him to scream and be unhappy throughout the night. IT IS NOT YOU - but you know that. It sounds like there is definately something wrong with your DS. Have you seen a paediatrician? Is he on meds for reflux? I'm sure you've already looked in to this but it doesn't just sound like sleep is the problem but rather there is a physiological problem causing him to wake frequently and cry (leading to no sleep for all!!!).