rita

You hit the nail on the head when you said that none of the diets worked for you. And none will. No new miracles developed in this area. If you look at your own personal history with "diets" as well as all the diets that have been touted as the new miracle one, you will see a pattern develop: Diets DO NOT work.
Do yourself a favor and don't look for diets. Instead simply lower your calorie intake (gradually, if need be) to allow for a deficit in your daily calorie intake. To speed things along do not lower the calories too drastically. It will backfire on you. Instead, increase the amount of daily physical activity. It doesn't have to be at the gym. Anything you do will be good: walking your dog, walking to shops, running around your neighborhood all count.
There is a way to calculate your daily calorie needs and also how much you need to eat to lose weight. If you supply me with your vitals (age, height,weight) and the amount (hours) of exercise you think you do or will do in a week, I can calculate these numbers for you.
By the way, when you choose the foods you eat don't put any food "off limits". There is no need for that. Eat WHATEVER you enjoy, simply limit the portion size. It's not a "diet". It's a way of life.
If you lower your calories and up your activity you will lose fat, no doubt about that. Do not try to lose too much weight in a hurry. It's not healthy You will be slim again if you just have patience and do not give up. I know many women who had as much weight to lose as you after having babies and they lost it all, even more and look fantastic.
If you can join a gym and go there even for only 30 minutes of daily cardio, it would be great. If you cannot then just get some tapes of cardio workouts for home. You should also include some weight training to get some muscle mass and develop a great shape which will be revealed as the weight comes off.