I have had spotting/bleeding since about 6 weeks with this pregnancy varying amounts and colours, from bright to dark , in hospital emergency at 7 weeks with cramping and thought for sure I was going to lose the baby. Just had my 13 week scan and the baby is healthy and happy and no sign of the bleeding, in my case it was a sub H where the placenta tears away form the uterine wall, it requires lots of rest(bed) to heal. I hope you ar eable to get in to see your OB, if not a trip to hospital may be worthwhile. Good luck and hope all turns out well.