Bleeding

Hi All- I need some advice. I am 37 yo and pregnant for the first time. I believe I am 6-8weeks along (first Dr's appt 3/2). I started spotting (very light) yesterday and today it has gotten a little heavier at times with a few clots. Now when I say heavier, I mean I am still wearing a pantyliner but it is more than a few spots. I called my Dr's office and she said it was common. I am not having any cramping, should I be worried??? Thoughts/suggestions?