How much can junkfood stunt growth?

From when I was around 12-15 I ate a lot of chips. Everyday. Also ate ice cream more or less every day in a year or so. Typically I'd eat a pizza (without cheese) for lunch. Though this aside, I ate normal and relatively healthy foods (not so much fruit though) and did little to no exercise at all. Was 15-20 kg overweight for some years.

Do you think this can have stunted my growth? If so, by how much? I'm 18 now and only 170-171.5 cm (5"7) I was 34 inches at 2 years so I'm supposed to be 5"9.

Considering I've been eating very healthy from 17+ will I still be able to reach my full height?

Thanks..
How much can junkfood stunt growth?
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