I have anxiety, I also am on medication for high blood pressure, although its not crazy high, its 120ish over 90ish unless I relax then its lower.  The other night my son woke up screaming and I woke up from a sound sleep and bolted to his room, by the time I got to his room my heart was pounding so hard that it hurt.  It only hurt while pounding and has not hurt since.  Could that one incident have damaged anything?  Its never beat that hard, it scared me...
After sudden awakening or sudden standing from prolonged lying position like after sleeping, some may develop palpitations or pounding of the heart.it is due to reflex mediated tachycardia with increase contractility...it is normal. So you need not worry.continue your anti hypertension Chat Doctor. .avoid sudden unloading of heart