Sorry the doc you saw was so blunt.
I've had that attitude from GPs once or twice too! It's very upsetting/humiliating. But then I try to imagine that they are having a terrible day at work, (eg people dying), and/or their own relationship problems at home, and I can see I appear to be wasting their valuable time with something trivial/non-urgent? (Like that, I don't take it so personally!)
However, the loveliest/best GPs somehow instinctively know when a few crumbs of genuine empathy, & some reassurance/support/hope, will work wonders? (Rather than a prescription/disagnosis?)
Anyway, brush that bad incident off. (It has happened to all of us.) Be strong, and just show that GP you can do it on your own, as he obviously thinks that there's nothing wrong with you/stopping you?
Good plan to have a break, (from the diet), for a couple of days. & to then start again tomorrow.
Agree with swallowedAfly that you should switch to protein & veg meals rather than soup and bread.
If you have yoghurt, hope you are using the natural (unflavoured/unsweetened) kind? (It tastes nice when you get used to it.)
Avoid cereals and anything sweet/processed.
Just eat enough meat/fish/egg with loads of (green) vegs and small quantity of fruit, & some dairy.
Avoid bread/pasta/white rice. (Small amount of brown rice mixed with veggies like peas, sweetcorn = good ... and makes you feel full a lot longer.)
Agree potatoes can be your friend if boiled or baked. I like to 'bake' mine in the microwave (until very well cooked inside) and then I eat them (incl the skins) with some butter and/or baked beans. (Really nice/tasty and filling.)
Mackerel is another good idea from swallowedAfly. I can eat one big fillet, (cold), it on its own, or with some tomatoes/salad. (That's a good meal.) Then you could have a generous helping of plain/natural yog or some fresh fruit (eg an apple/orange) for dessert?
Really hope you start to see some results soon!