Yay congratulations! I found this link that says a normal heartrate for a 6 week pregnancy is between 90 - 110. You're there!
http://www.ob-ultrasound.net/
Thanks for your support! Hope all is well with you!
To my knowledge it is. Between 7-8 weeks, it will get much higher...usually in the 120's-170's. I think it is only a 2 chamber heart right now. The rate will be higher in a couple of weeks.