Quoting momma of an angel:" I just have never seen a baby at any age who is completely asleep n will start crying cause they are ... [snip!] ... her.. im just wondering why she wont sleep unless in my arms... its all i do is lay flat back with her laying flat on me..."
Just remember that she's only known YOU for nine months. She probably likes sleeping on your chest because she can hear your heartbeat, your warmth, feel you breathe and the like. And believe me, I know that it can get frustrating having a child that wants to be held 24/7 [DD is 7 months and just now starting to venture on her own], but remember that she's not always going to want mommy and you'll start to miss her wanting you. Have you tried a heartbeat bear or stuffed animal or swaddling her tightly?