Pruning a Blossom Cherry a mistake???

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Hi everyone, I'm trying to grow a flowering cherry tree (blossom cherry tree) and I've never pruned it but last autumn I thought to cut it back so it grows bigger this year but actually it's smaller and I'm worried I've made a mistake. On a RHS is said Flowering cherry trees should not be pruned unless you want to contain them or have a disease. I feel like crying as I should have left it the way it was as now its smaller but so many articles promote pruning. Is it possible I will get a bigger growth this year and it will compensate? I'm so upset as I want to grow it big and now I've cut back almost 3 years of growth.

I’m sure it will be ok. Leave it this year and see how it gets on.

Agree you've probably not caused a disaster but you will have to wait and see what happens. Might not hurt to feed it a couple of times over the summer.

They should be left alone but if you do need to prune it for size reasons in future you should do it in spring/summer, as they are more vulnerable to disease over the winter.

Thank you for your answers. I want to grow it as big as possible and I'm very upset because I've pruned it thinking it will make it grow faster and change the shape.
At the moment new branches seem to grow so I'm trying to be optimistic.