i experienced this with my first at 8 wks and was told i had a missed misscarriage. I only experienced the smallest amount of blood so i wasn't that worried about it either.

I don't want to alarm you, but u may be having a threatened misscariage. It would be best for you to go and find out for sure what is going on, rather than waiting it out and making yourself more worried over what could be absolutely normal.

best of luck, i hope all goes well.