I have been lurking very occasionally but have really struggled lately. I am now realising that I don't deal well with stress and I think I might be a little bit depressed.
We moved back to the UK in summer of 2012, after 10 years of living abroad. During those 10 years we moved 3 times to different countries, and every time we moved I gained weight. Once I was settled and unpacked, (which sometimes took up to 4 months in temporary accommodation) I would get active, get back in control and the eating and exercise would be back in control and the weight would slowly come down.
Since we've been back in the UK we rented for 10 months while house hunting - the rental house was freezing cold over last winter, we never bothered unpacking most of the boxes because we knew it was another temporary house, and I was miserable. So the exercise stopped and the weight piled on again.
We finally moved into our lovely house in July this year and I thought I could get my life back on track. But we have had builders in since day 1, and they are STILL not finished. Being a SAHM I cannot escape the noise, dust and invastion of privacy. DH comes home and interrogates me about what the builders have/haven't done that day. Me and the dogs are virtual prisoners in the kitchen as the front door is constantly open.
The last straw came last week when another firm came to build our fitted wardrobes. By now the building work should have been finished, and we should have been able to move into the spare room while they installed the wardrobes. But because the loft conversion isn't finished, DS is still in what will become the spare room, so we have nowhere to go. So everything in my bedroom is COVERED in sawdust, despite us covering up with dustsheets or boxing up.
I had a complete meltdown at the weekend. Cried and ranted at DH. I feel I have no control over my life, everything is on hold until the work is finished, I can't look for a job because DH works such long hours that I have to be the main carer, even though the DCs are at school all day. And even if I could look for a job, what could I do now, having been out of the market for over 12 years? My self esteem is rock bottom, I look like crap and the thought of dressing up for Christmas parties fills me with dread.
So, having hit rock bottom, the only way is up, eh? 
Sorry for such a long ramble but it has helped to get it all off my chest. I really want to get back on the straight and narrow (and back in the quiche!) but I need to get my head straight before I can think about losing weight again. For me, it's definitely about my state of mind. And it's not good right now. I just need to grit my teeth until all these bloody builders have gone.