Good day, should i be concerned if my bp is 136/128 and then after 15 min, 181/97. still feeling dizzy. felt like i was falling over while sitting still and also felt like that during the early morning hours while sleeping?

Check up needed: The second measure corresponds to a hypertensive crisis, or really close because of the diastolic measure. However adding your symptoms is totally needed to see a physician and maybe start anti hypertensive care. An increase in blood pressure in those numbers is really important to attend as it can lead to serious consequences.