I had a similar thing happen to me at a pill check. My weight has yo-yo'd from 11st to 15st over the past 10 years, so I know how hard and frustrating it is to lose, put on, lose, put on etc etc
My doc signed me up for the NHS weight management program, which did work for a while. But I am one of those people who need the discipline of regular weigh ins. The weigh in clinic's were all during the day, and for someone that works it didnt work out. The only weight check I had was every 3 months or so, so it was easy to lose focus and cheat.
So I gave up and consequently put on the weight again.
My DH is also very overweight, and after a health scare and a very serious/harsh talk from his doctor, he was told lose weight or die .. basically!
So we are now both at weight watchers and it is working. It is tough, but we have both lost a stone in around 12 weeks and I feel fantastic. I have still got a couple of stone to lose, and my DH has 5 stone to lose, but we will get there.
I think sometimes to have a doctor/nurse to look you in the eye and tell you a harsh truth, that deep down you know, just gives you that extra push to start doing something about your weight and live a heathier life. I am sure she wasnt intending to be cruel, more like tough love as it were.
You can do it, stick with it and try different diets to see how you feel on them. I could never get on with slimming world, it was a little too fiddly and since I have strange intolerance's to some foods, then it didnt suit.
I would recommend a weekly meeting too. It gets you out of the house and chatting to other people in a similar situation. Most of the people that run Weight Watchers all have been on diets, so they understand what your going through.
Just by losing a stone I feel great and not hiding in lose baggy clothing.
It's tough, but my god is it worth it!!