OP, a huge number of people have diagnosed high bp. Many more will have it without knowing. You are fortunate because you know about it. Lifestyle changes (relating to food, alcohol and exercise) will bring it down. If it still remains high, you can take medication.
I was diagnosed with very high bp in my second pregnancy. The diagnosis, combined with hormones and the fact that my ds had to have surgery a few days after birth, kicked off a long period of postnatal/health anxiety. I was convinced I was about to drop dead of a stroke or a heart attack at any moment. And I began to be scared of being anxious in case that made my bp worse!
Looking back, the fear was my anxiety talking. In reality I was well medicated and started doing all the right lifestyle stuff immediately. My bp gradualy came down to borderline/ok levels, but I have stayed on low dose medication as a safety net.
Don't let this prey on your mind. Use it as an opportunity to get healthy. The exercise will help with your anxiety too.
I'd also recommend a book called The Compassionate Mind by Paul Gilbert, which helped me understand and massively reduce my anxiety. 