One thing to consider is that our blood pressure changes constantly, depending on what you are doing, if you are stressed or not, if you just ate, if you are making love, if you are sleeping or just sitting down and standing up.
A high blood pressure single episode doesn't mean you are hypertense, it could have been axiety, smoking too much, etc.
To actually know what is going on your doc will surely indicate a test that involves having your blood pressure checked every 15 mins or so during 24 hs, writing down everything you are doing.
A good thing to do is to drink a lot of water and reduce sodium a little bit in the meantime.
I had 220 110 at 23 yo and I am not hypertense, I am usually at 120 70
Nik