It’s very easy to undo a week’s deficit in one day. If you aren’t losing then you are not taking in less energy than you burn. Weight loss is not linear but you should be seeing a downward tend over time.
I’d take a closer look at your tracking. I also recommend working on your feelings around food. Thinking of food as treats doesn’t encourage healthy eating habits and people who think this way are more likely to binge and less likely to keep the weight off long term.
If you have a lot of fat it’s very easy to lose large amounts with minimal effort, especially in the beginning. There so so much accessible information out there about nutrition, weight loss, psychology and how your brain and body work. I highly recommend digging in.
Have you read the book “intermittent fasting made easy” by Thomas Delauer?
He talks about the proper way to break the fast and what to eat when. One thing he says is don’t mix carbs/fats when you break a fast because cells are so receptive to whatever is coming in at that time. Break it with some lean protein with a mini-meal. Then about 60-90 mins later you can eat as you normally would.
How have you been breaking your fasts?