I want to echo the advice that you not give up. No matter what the scale says, you are doing your body so much good by exercising.
However, that said, I also want to offer you one of the SP mantras: "You cannot out-exercise a bad diet."
Perhaps you could try this for the next 7 days: (1) Don't guess about your food. Don't estimate. Actually weigh and measure everything you put into your mouth--every drink that has a calorie, every lick off a spoon, every bite as you cook. In this way you will pay attention to HOW MUCH you are are eating. (2) Write it all down, so that you can learn to become aware of WHAT you are eating.
I think you are likely to find the solution to your problem in putting some focus on what kind of, and how much, food you eat.
Once you do, you can decide whether or not you want to make changes in this area of your life. I suspect that, if you do, you'll begin to see weight loss.
I eat well and in correct portions to lose weight and increase my health. I exercise to tone my muscles, strengthen my bones and increase my health.
I need both for balance. Perhaps you do too.
Best of success to you.
Proud Pink Pirate!