Hello, I just measured my pulse and blood pressure and am a little worried. While having a pulse of 86, my blood pressure was only 44. I feel a little dizzy, light-headed and tired. Am I in acute danger? I've had issues with tachychardia for about 4 years now. It gets extra bad when I have exams or am stressed. In order to not have a racing heart during my exam today, I took one beta-blocker before going to sleep, and one in the morning before school. Was this too much? Is it dangerous in any way?