I'm 14 and I have what I believe to be growing pains?!

I got my period when I was 11 in september(birthday is december 1st). So my thyriod doctor(unnrelated) said I stopped growing. This week(I'm on my 3rd day) of the cabbage soup diet. So now my feet and ankles hurt a little and it feels like growing pains. So is it growing pains? How much am I to grow? and is the diet affecting anything.

I am 5'3
And teh cabage soup diet is where you eat soup for a whole week along with a particular food.
day1-soup and fruit
day2-soup and vegies
day3-soup and fruit and veggies
__________________________
day4-bannanas and milk & soup
day5-steak and tomatoes & soup


day6-steak and veggies & soup
day7- brown rice & soup



so is the diet bad?
is this normal?
how much will I grow?
am i growing?