I just typed out a huge long message and it just got deleted when MN went offline 
Will try to start again - please bear with me as it may be long.
How long does it take for the pu/pd thing to start to improve? I have been trying it for the last 3 days with my 4.5month old DD and it varies between 20 minutes and an hour of picking her up etc, I am so tired. If I get her down at exactly the right time it all goes well but this afternoon I had to go out in the car and she was so exhausted when we got home that after 40 minutes of Pu/pd I had to abandon it as she was screaming and stiffening her little body on the way down to the cot
so we went out for a walk with the sling and she fell asleep on me.
I have read the Baby Whisperer book but nowhere does she actually tell you how to do it - a friend tells me its the other book where she describes the technique and also sssh/pat but can anyone tell me what it is? I'm worried I'm doing it wrong and thats why she hasn't improved yet...(I've just ordered it from Amazon but would like a headstart)
Also, she is a terrible napper. She only naps for 45 minutes. To the minute. I know this is how long her sleep cycle is and this is also the reason why I'm trying to get her to learn to sleep herself - she wakes up and is still soo soo tired, the other day she went back to bed after only 20 minutes of being awake!
She has a dummy that she is pretty attached to (only at bedtimes) but she has started to try to pull it out so she can put it back in again herself but obviously she doesn't have the motor skills yet and it is so frustrating as at naptime and bedtime she will often be almost asleep when out comes the dummy and she cries. I've tried leaving her to see if she will settle without it but she just gets more awake. I am so very tired as she is up a lot in the night at the moment which I presume is the 4 month growth spurt combined with her trying to roll over.
If you're still reading and have any advice about the dummy ( I think I know I've got to go cold turkey - How long does that take??? So tired)
or if you can describe the shh/pat and pu/pd techniques to me I will love you forever!
I have just been diagnosed with PND which I'm sure has been brought on by the terrible sleep that we both have. sometimes I am so anxious about being woken up that I just lie awake because I can't sleep and I am in a vicious circle! 
Help!