2 possibilities:
1. white coat hypertension. worry and anxiety in the doctor's office temporarily raised your pressure on every visit. to be sure, just buy a battery operated bp monitor and check at home instead of in the clinic.

2. real hypertension, either triggered by the cycle, or just a coincidence. any family history? this may mean meds forever. increased cardio, decreased bf% and salt intake may be able to control it somewhat.