Cavities and Crowns

[kyu]

I went to the dentist and I have twelve cavities and two that needs crowns. Im really scared because Im relatively young, and am a bit devastated to have already done this damage to my teeth. - Ive never had to have a crown before.
I brush and floss twice everyday but I continue to get cavities, if it keeps going at this rate I'll have to get false teeth or something, does anyone have any advice?

 

[honestdoc]

What beverages do you drink? Do you eat sweets? Have your dentist prescribe you Fluoride supplements and drink more water while cutting the sweets.