Yes it's high, but single BP readings are never very accurate. Who did this test? Your monitor may have been faulty, however on the other hand it could be accurate. In this situation you should see your GP. He'll take your BP again and if it's quite high he will arrange for 24 hour BP monitoring and further tests to check your kidney
function and hormone levels to exclude secondary causes.
High blood pressure
in a young person is not common and always needs thorough investigating. Optimal BP is <120/80.