Don't panic, mamaa It was just "a bit high" You are a worrier, and your BP goes up on sight of a doctor or nurse - they are used to patients like you!
High blood pressure is one of the things that usually respond well to treatment, and there are very few people whose BP doesn't go up as they reach their 50s and 60s. If they find that yours has too, you should be happy that it is now detected and will be treated - that is far better than having it soar undetected!
Even if it stays "a bit high" they are very unlikely to "find" something terrifying that can't be treated. You would be prescribed suitable medication and life-style advice (the usual - don't smoke, watch diet, walk more, worry less) and then checked at intervals.
You would have joined the "elderly" pressurised majority!