I can only sympathise with you as I know how tiring and frustrating it is. I am sure that you have contacted one of the many fabulous recommendations that have been posted but if it helps, I used an amazing sleep consultant called Heidi from The Parent and Baby Coach. I was at my wits ends when my DD did not sleep a wink and I felt like I was losing my mind.
Within a week of getting Heidi in, she had set my baby into a sleeping routine, and helped me regain my sanity again, she was truly amazing and I would have no hesitation in recommending her.
A few of the NCT mums that I have met have used her and have all have similar success.
Whomever you try, please know that you are not alone and that there is help out there for you.
Heidi can be reached on:
www.theparentandbabycoach.com
07825 914096
Good luck