I was heading towards doing CC and did it once but thankfully I called the parent help line and they told me that they don't reccommend that any more. They suggested wrapping him, What the? I stopped wrapping at 4 months but incredibly it is working!!!!! We did have a few sessions where he would cry a bit, but Iwas there the whole time and he dropped of within 15mins or so and never did he cry for very long. I would pat the mattress, he doesn't like being touched, and go faster and louder if he was crying and he would stop. We have since put a fan in his room and after he is wrapped he watches that to go to sleep, without me there. Twice he has been quite happy and talked to himself/the fan until he went to sleep. he unwrapped himself a bit but I don't mind, he is putting himself to sleep. HE is also sleeping longer and I am much much less stressed.

Overnight is still a huge issue with me doing night feeds but now he is going to sleep I feel I can start the 'no cry sleep solutions' techniques. When nothing was working to get him to sleep I couldn't do what I usually would.
Maybe try wrapping and see what happens. It all depends on what level of crying you are happy with - none at all ever or a little bit with you present.