I'm not sexually active, but would it be wrong to take some form of birth control to make my boobs bigger?

Prob wont work: Sometimes i hear from patients that they noted a slight enlargement in breast size on birth control but that is rare. This is not a typical or reliable side effect of birth control. I suspect this will not be a good solution to your concerns.

Yes, likely: Taking any unnessary medication, particularly hormonal altering effects, should be avoided in most all cases. In addition, not all patients experience noticeable enlargement of breasts. I would strictly follow your physicians advice and controls.