Hi Emily,
Based on the thus far sketchy report of your injury and present medical status, it's hard to offer any definitive opinions. However, if it was an uncomplicated closed linear fracture there seems to be no reason to expect that it shouldn't be well healed in 4-6 weeks, 6-8 weeks max.
As for diving, one should be able to resume once the doctor releases the patient for full physical activity. As has been mentioned, it is quite important that there are no remaining neurological or neurocognitive sequelae of any significance. If your physician has any uncertainties about return to scuba, s/he can contact DAN.
As for both flying and scuba, there is no reason to expect that such a fracture will be responsive to changes in ambient pressure.
Regards,
DocVikingo
This is educational only and does not constitute or imply a doctor-patient relationship. It is not medical advice to you or any other individual and should not be construed as such.