First, it's not that frighteningly high. See this chart. Sure, get it checked, but I'm afraid that you're going to be panicked when you go, which will raise your blood pressure even more. So, when you do, make sure you relax. (Any chance you were a bit apprehensive about the upcoming needle?)

I suggest you either invest in a home monitor (or borrow one from a friend) or check yourself every week for a while in a drug store or grocery store. See what it averages out to over a period of time.

Lastly, please get this idea of being a "failure" out of your head. Blood pressure rises and falls so many times over the course of a day. You can't take one reading seriously. And, even if your blood pressure is borderline high, it's nothing that can't be dealt with through dietary or medical means. Some people are just predisposed to hypertension. You may be one of them.