There's a sweet, simple, short and absolutely *amazing* DVD that came out recently that helps us understand the 5 different sounds/cries that all newborns make (all over the world, every newborn makes these 5 sounds) - Dunstan Baby Language:
http://www2.oprah.com/tows/slide/200611/20061113/slide_20...
http://en.wikipedia.org/wiki/Dunstan_Baby_Language
You can check out the DVD (for free) at the Cincinnati Public Library: http://catalog.cincinnatilibrary.org/uhtbin/ckey/1680633
I only *wish* I'd had this for my kids when they were born... it really does work, and it helps us (the parents) meet the needs of our babies best, because they're actually *telling us* what they need if we know what to listen for!
Also, doctors are now finding that the term "colic" is frequently just a misdiagnosis of an allergy (usually to cow's milk and/or soy) in the infant (whether getting breastmilk or formula - if breastmilk, the mom would need to remove all cow's milk products, if formula fed, a switch to hypoallergenic formula would be needed) - here's a short but *very* informative article that explains it more by a pediatrician who is an expert on colic:
http://www.wondertime.go.com/learning/article/interview-c...
Last, but not least, if he wants it (if it's a "want" at that age, it's actually a "need"!), do hold him as much as he asks. Babies are in our bodies for 9 months, and switching from that warm, cozy womb to the cold, huge outside world is a gigantic transition. A good baby carrier that keeps babies close and comfy, like a sling or wrap or soft structured baby carrier, is a *must-have*! A sling or wrap or soft structured carrier is typically a much, much better investment (same price or cheaper than a baby bjorn carrier) as they're more comfy and healthier for both baby and mom - here's a site that explains the different types of carriers:
http://peppermint.com/anatomy.html
These carriers are typically *not* available at big stores like Babies R Us, etc. Your best bet is to hook up with a group of moms who share a hobby of trying/using babycarriers and see what you like from what they're wearing, then order your favorite carrier online. There's a free, non-profit group of babywearing parents in town and they meet at least 1x a month, if not more often - they're super helpful, nice, and can help you find something that's really comfy for you and your little son:
http://groups.yahoo.com/group/cincinnatiNINO/
Congratulations on becoming a mother for the 3rd time to your sweet baby son!