Elevated heart rate?

I'm approx. 6 weeks along. I wear a Fitbit with heart rate monitor and noticed my resting heart rate is around 85 bpm when it's normally 62 bpm. I found out I was pregnant a couple weeks ago when I also had pneumonia. Heart rate was high then. Not sure if it's the coughing associated with pneumonia or the pregnancy. Is a high heart rate something anyone else is experiencing?