Chin up sophie, my daughter is having a really rough time too, she's lost her job today, no money, split from husband and supposed to be going on holiday in two months time, she's paid for most of the holiday already. I'm in bits because I live a long way away from her, and can't do much to help her. I've tried to tell her that the bad times won't last forever and she will eventually come out at the other side better than before. I hope to God it won't be for much longer.
All I can suggest to you is set out your goals to follow, and mean it. Look for a job. Go to the gym and really work at it and start your diet. Don't know about special k diet but its a start. Then think about clothes and holidays. If you do get the job you can then put away some money every week for a holiday and clothes when you've lost some of your weight.