The reality is that just because you eat “healthy” it does not mean you will lose weight.
Overriding all, if you eat more calories than you burn you WILL put on weight. Everyone defines healthy eating differently, and it is very easy to overeat on a “healthy” eating plan. To ensure success you need to understand how many calories are in each meal you eat. Just making the change to “healthy” has no magical weight loss properties.
If you aren’t tracking calories you’re fiddling in the dark.