Ok so I'm 13 and today was the first time I ever saw a dentist! I drink alot of soda and eat alot of sweets (hence me weighing 13 stone

and I have been going through this stage of not brushing that much (once a month) and I found out today I have gum disease (bad type) a cavitiy in every one of my molars I need a root canal and 5 teeth pulled and I need crowns on 3. Oh and I'm going to need braces soon. This pain is going to be to much to handle!! How will I cope?? Do u think I deserve it for not brushing much or flossing at all?