I am taking Mucinex D for congestion. I am a female 53 years old, in great health and I weigh 154 and am 5'2". Before I got the congestion my average resting heart rate was between 54 and 60. Right now it is at 70 with spikes up to 90. I exercise with cardio three days a week and weights two days a week.Just concerned about the increase and wondering if I can attribute it to the Mucinex....