Shame, like the other ladies, I can really sympathise with. I had a really horrible sleeper from birth, there were times when she didn't sleep at all during the day, at night she would also wake every 45 min (their normal sleep cycle) and most times it would be an hour or so's excercise to get her to sleep again. I really thought I would never ever sleep through the night again.
But all of a sudden when she was 9 months (beginning of January) she started sleeping through the night (11-12 hours) all by herself and she also sleeps like a champ during the day now as well (2 sleeps of 1.5-2.5 hours) - all of this happened magically because of prayer I think.
I still can't believe my luck, I still don't sleep through every night, I still go and check if she is still breathing, so almost 2 months later and I still can't believe it.
I know none of this you want to hear now, I was also there, one is SO sleep deprived and you have tried every trick and remedy and calming method in books and what everyone tells you. I'm sorry, there really isn't anything that I did or any natural remedy such as camomile tea (for example) that did the trick, she just started doing it by herself.
Good luck and hang in there, like the other ladies say, it really does get better at some point.