SOme people have some light bleeding. When do you go back to your Dr or have another u/s? Did they see a heartbeat yet?
I have been experiencing the same thing but I am 9w2d and mine started when I was almost 6 weeks. During that time I had red bleeding but no cramping. I had an u/s done and they said they seen some bleeding but nothing to worry about. I think you should be fine as long as you don't fill a pad in 2 hours!!
by the way i have not seen anymore blood since sunday.just that one day