RE: 9 weeks & desperate..
Have you read Dr. Karp's "The Happiest Baby on the Block"? He has a combination of soothing techniques that he calls the 'cuddle cure'. It involves swaddling your baby, holding her on her side or stomach, swinging or jiggling her, and giving her something to suck on while you simultaneously say "shhhh" loudly by her ear. It sounds complex, but it's really not and once you get the hang of it, it works!
Even if it doesn't put your little darling to sleep right away, it should soothe her crying and calm her down.
Kit
Littleman 10/03, Mr. Sweetcheeks 08/05, Babyman 11/07