Hello, I'm a 23 year old-male, Pretty athletic(lift weights 3 days a week and ride 12 miles on my bike 2 days a week) 5'9" and weigh 142 lbs. I don't smoke or do drugs and rarely drink. My Dr. tells me that I have pre-hypertension and white-coat syndrome.

Had an EKG preformed about 12 years ago, that came out fine.
Wore a halter a little over a year ago and that came back normal.
I have my own blood-pressure-monitor now and been keeping track of it since May 14th of this year. My average Systolic is 124, Diastolic is 64.

Sometimes the diastolic is pretty low(low to mid-fifties while the systolic is 128 or more, usually. sometimes its 117/57. Sometimes it's like 132/72. I do feel a little bit light-headed and tired more often than not now. Should I be concerned, would you think I have stiff arteries? or just stress and thinking about it too much?

I currently take Advair for asthma(for about 2 months now) was prescribed a lower dosage which worked for about 3 weeks... the final week it didn't help at all. Was prescribed a higher dosage which seems to help, but could it be causing or adding to my symptoms?

I've also have been diagnosed with having GERD had 2 EGD's preformed, the first they fixed strictures and gave me Protonix. They second time they didn't find anything other than "slight inflammation in my stomach".
Didn't recommend eating certain foods.

I'm not sure what's going on, but I don't like it. What should you recommend I do?