I can definitely understand how frustrating it can be!
1. Are you following a diet/exercise plan, and if so, what is it?
I myself am a calorie counter. I thought I was eating right. I mean, I was eating healthy things, but I wasn't aware of how many calories I was consuming. Even healthy things can be high in calories, and cause you to gain weight. There is also the other side of it. Some people don't consume nearly as many calories as their bodies need to maintain, and their metabolism is convinced that it's starving, and it will hold on to the fat thinking it needs to save it for a later date, in layman's terms.
If you take the calorie way (which has been successful for me, and many others), the first thing you need to do is figure out how many calories you should be consuming.
This website was suggested to me by Jasmine31, and it was a life saver for me. It was a great start!
Women's Health Calculator. Just follow the instructions, and it will give you a wealth of information.
Second, if you are counting calories, and haven't before, you might want to try an automatic calculator, like
Fit Day or
Calorie King. Fit Day has an option for free or pay, and Calorie King has a 7 day free trial. Basically you enter the foods you are eating and the exercise you are doing, and it automatically calculates your calories in and calories out, as well as you carb/protein/fat intake.
Try to set a realistic goal. For myself, I am recommended to try to consume 2000 calories a day to lose weight gradually and healthily. But I consume about 1600-1800 because I'm just not used to eating that much food (I underate most of the time, and moderately binged every week or so, so my metabolism was very confused). This works great for me!
If you have any questions, just let me know! Many of the 20-something girls are also calorie counters, so there is a wealth of information here.
I'll cut this short now, let you look over a few things, and let you respond before I go on even further
Have a good night, and good luck! We're here for you

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-Mande