Even after being in healthcare I still have "white coat syndrome". My BP at my DoDMERB physical was close to 150/90. As a young kid there aren't many differential diagnoses or co-morbidities to warrant you having a a constant physiological high pressure. Granted you might have a familial history of HTN, but I don't think a level like that would be a immediate DQ. Remember BP fluctuates a lot during the day...
Plus your diastolic was within normal range, which is a big positive and makes me think you were just nervous.