We changed everything from the same day.
The Sleep Specialist came recommended to me by two unrelated people so I thought she must be good. I contacted her and she emailed me a really in depth questionnaire all about DS, his personality, his sleep issue, his daily routine (I.e meal times and nap times), what methods had we already tried to deal with his sleep and what kind of parenting style me and DH used. She also asked for a detailed breakdown of his previous 5 nights sleep, I.e when he went to bed, times of every wake, the time he then went back to sleep and how we achieved it, did I feed him back to sleep etc.
I then emailed it her back so she could formulate her plan and then she phoned me about 5 days later to discuss her ideas with me. The phone call is scheduled to take place over 2 hours, as is part of her package, but we were on the phone for nearer 2.5. She spoke to me all about the mechanisms of sleep, why its so important that babies get enough sleep and then the different stages of sleep with explanations as to why DS was always waking up. She then went through my questionnaire me in more detail and then gave me her new routine for DS, set meal times, set nap times, a very detailed plan on how to break the feed and sleep association and then gave me a very specific bedtime routine to follow. She explained why things that I was doing as part of his bedtime routine were contributing to the problems we were having and why her changes would improve things.
She then discussed the different types of Sleep Training she does, I think there are about 6 options, and we decided to use the Controlled Crying technique as the other approaches were a lot more gradual and a lot slower to take effect and I just couldn't bear the thought of that. We then discussed Controlled Crying specific to DS, including when to go into him, when not to go in to him and what we should say and do if we did go into him. It was all just so specific which made it so much easier to execute as I wasn't having to second guess myself as to whether I was "doing it wrong" because I absolutely knew it wasn't.
Me and DH chose a week that suited us both to tackle it together (about a week after the phone call) and the results were amazing.
Within a week he wasn't feeding to sleep, was self settling to sleep, was having two cot naps a day, each lasting 1.5 hours and then sleeping through from 8-6. The woman literally saved my life, and my marriage probably.
She then sent me a follow-up email a few days later to see how things had gone.
She has about 4 different packages, I went for the most basic one, but you can progress through the stages if the one you choose doesn't work out.
We were worried about changing things all in one go, I.e own room, not feeding to sleep and not bringing him into bed with me, but I knew I needed fast results.
A woman I know used a Sleep Specialist too with her 12 month old and she chose a much gentler method of sleep training, which although did have full effect, it took over 6 weeks for the method of training to be complete, so there are more gentle methods available.
I didn't find doing CC hard as I really was at breaking point, I just couldn't have coped anymore with his poor sleep (day and night) and the fact the specialist had outlined everything in such a strategic and methodical manner just made it so much easier to carry out.