Thanks boss that post was helpful.
I'm 5ft3 and have between 7 and 8 stone to lose, so not that different to yourself. It must be difficult motivating yourself when you have a young baby. I was the slimmest I have ever been after having my son, but when I started to recover from PND I did the same as you, just ate and ate and ate. I live alone now and I find that once DS is in bed that's pretty much all I do. I admitted to my mum last night that I don't even enjoy food sometimes but I eat it anyway 
I've just been emailing the consultant and I can meet her this Thursday, so that's exciting. She seems lovely, gave me lots of information and said I'd see her face to face every four weeks and have support and weight ins via telephone or skype in between times. Feel quite positive after speaking to her, she seems lovely.
I am actually the most overweight out of my small circle of friends. One of them will be supportive, I know she will. She is very thin and has issues with eating that she has just decided to tackle, so although our situations are polar opposites, I think we'll find some common ground. Other friend has yo-yoed on slimming world for years, she is no-where near as big as me but would say CD is a fad diet and she is not a fan of those so I'm not sure she'll be that supportive.
I think its just the initial telling people that I'm worried about, the questions and the "oh but its not good for you to live on milkshake" constantly. I'm quite a self conscious person and not overly keen on explaining myself as I just feel silly. I know I don't have to explain myself, I know I'm doing something positive, I just can't be arsed having to answer to people.
I hope that the doctor signs my form for me, I'll be quite upset if I can't go ahead now. And sorry for the mammoth post, I'm just glad to have found some people in the same boat!