I'm a 26 y/o female. Every now and again I get a racing heartbeat, dizziness, disorientation, and the feeling I'm going to pass out. I had a blood pressure machine and took my blood pressure, and it was 152/101 with a pulse of 199. I've never had a high bp reading. I'm scared because every time it happens, it lasts longer. Any idea as to what it may be?