Thanks for writing to Health Care magic, I am Dr , Muhammad Ahmad , I have read your question closely, I understand your concern and will be helping you with your health related problem.
There is a term called "White coat hypertension". It came up when it was noticed that people having normal blood pressure when visit hospital for checkup, tend to have higher BP this is probably because of the anxiety
and concern about one's condition and what happens next. If you had higher blood pressure in the hospital but usually your blood pressure stays fine it is very much possible that you had white coat hypertension.
There is a simple thing to check it which you can do at home. Just get a Blood pressure apparatus and start checking your blood pressure twice a day if it stays below 150/90 then well and good there is nothing to worry but if it stays consistently high then there this probably wasn't white coat hypertension. And you will have to make at least a 5 days BP reading record on a paper and visit your doctor to get your medication adjusted.
Till then i would advise you not to panic just start checking your blood pressure at home.
I hope this answered your question, If you have more queries I am happy to answer you.