My heart is beating very fast, pulse rate 108 bpm, I have had this for a while now - the Dr had me on a Cardio watch to monitor my heartbeat and the results were high and varied from 108 to 126, my Dr therefore suggested that I visit a Cardiologist for an Echo Cardiogram but due to an error on their part, my appointment is not until 28th of July - I am 28+2 weeks pregnant and am concerned. Today for example, I was well and felt in goos spirits but within an hour my heartbeat increased from 96 to 108 bph and I felt tired, then, cold then hot. Should I go to the Accident and Emmergency unit?