Some foods contain more fiber, which is easy to produce satiety, that is, the feeling of staring at hunger without eating a lot. Some foods contain more water. Once the water is drained, your stomach won't feel uncomfortable. In my analysis (please forgive me if I am wrong), your situation is alternating between dieting and overeating, or there is such a tendency. I think your situation should be caused by psychological factors, but it's normal. That is, the idea of slimming comes, sometimes it can be restrained very well, and it can be persisted without eating for several hours. But once you are too hungry, or you have made some achievements in slimming, you will be unable to restrain yourself from eating more, and you will eat more than usual. You said you didn't feel full, just because you weren't full.

The only way to lose weight is to eat less and exercise more, and the only way to keep it is to eat a balanced diet. If you are hungry for a while, you will lose weight every day, but you will never reach or maintain your ideal state.

I wish you health and beauty!