Take a look at your awake time, it may be too long or overstimulating. When you see the first yawn, then begin her wind down routine.
A lot of young infants will cry during the wind down routine. This is normal. What you can do, is be supportive and keep yourself calm. Also, the time before the wind down routine, make it low key and very calming. Kinda like a pre-wind down routine.
Do you have Tracy's new book? She has a whole chapter devoted to teaching sleep and talks about pat-shush. Also, I'll attach Tracy's Sleep Interview to this post. She discusses Pat-shush in it.
Let me know if you need any help,