Actually, technically, tachycardia begins at 100 bpm, but Catherine, you're right, most docs don't get too excited about it until you hit 120 (the point at which I was told to go into L&D) Tachycardia seems to be pretty common in hypertensive pregnancies, and it can be a symptom of worsening PE.
Heartrate is one of the components of blood pressure, and some antihypertensive medicines help reduce blood pressure by reducing heart rate. I had pulses around 100, too, Sandra, and felt like you describe and unfortunately the only thing that ended up working for me was the meds! Have you spoken with your doc about it yet, Sandra?
Mom to Alicia (severe PE) 5/98 and Camille (htn, oligo) 4/03