It is against BL rules to refer to yourself in third person, so please review them.
You should really see a dentist, and in the meantime focus on cutting down on the usage or removing the meth altogether if possible.
That said, having had extensive dental renovation (due to the byproduct of opiate abuse) there are some things I've learned that are worth sharing.
Many if not all drugs-illegal or prescription- produce changes to the pH of saliva. Because of the impact of the pH change in saliva,such as cavities forming, it generally will not return to baseline even upon discontinuing the drug. Unless you are fastidious in maintaining your dental hygiene along with keeping your body adequately hydrated, you're likely going to face dental problems of some sort.
For the sake of this response, I'm going to presume you have no dental insurance (or may be on the same plan as your father, which could pose an issue?)
If you know you can't be honest with your family dentist, you could start by looking into an area dental school that may charge lowered fees for an examination. If this is not feasible, make sure you're maintaining your dental hygiene from this point forward.