have you ever tried the Endometriosis Diet? Or maybe the Paleo Diet?
I used to be quite overweight as a kid/teenager as well. I was a size 14/16 and now I am a size 8 and have been this size for the past 7 years
I am 30 years old now and basically follow the Endo-Diet.
This also helps my Endometriosis pain a fair bit.
I basically don't eat any sugar, cows milk, gluten & wheat.
Instead I eat rice, sometimes gluten free pasta, sweet potatoes in every form lol, organic & free range chicken (if I can afford it), fish, sometimes pork, lots of vegetables, I cook my own soups and make everything from scratch. Instead of bread I eat rice cakes (it's nice with houmous and cucumber). You get a packet of organic rice cakes in the free from isle for £ 1 at ASDA. If I crave something sweet then I eat cashew nuts. Sometimes but very rarely I will have a piece of very dark chocolate the strong 85% one which doesn't contain milk or sugar.
One reason why I decided to change my diet is because I started a course in Nutrition a year ago. Learned a lot there. My tutor send me a lot of links to very helpful websites not long ago
In terms of exercise all I do is I walk an hour a day with my dog through the park and my job is quite active. I run around outside with the kids at work a fair bit each day. But I never go to the gym as I have severe Asthma and pass out with an Asthma Attack after running for 5 - 10 mins.
Hope this helps xx