Try this..
Swaddle your LO and take a seat in a comfy chair thats easy to get out of, or walk, either works, lay her on her side, either faceing you or faceing outwards, just make sure she isn't to close to your chest, Give her a paci or something to suck on, NOT the boob though, then rock sway gently, and shhh by her ear, not into it as that will hurt her ear.
This is a modified pat/shh we used for DD when she was the same age as your LO. When she calms and enters the first stage of sleep, lay her down, at first she'll wake up repeatedly, its still a lot of work, but if you stick with it, it WILL work.