I have the same issue. I called my OB and she told me that dark brown spotting is ok. Put on a pad so you can really monitor the amount. As long as it's not as much as your regular period, it should be fine. She won't see me until my original schedule at 8 weeks. I don't believe it's 100% ok but the reality is that at this point there's very little you or your OB can do to change what is going to happen, good or bad. Even if your OB sees you now he/she probably wouldn't be able to determine for sure if the pregnancy stopped already as it's too early. Stay relaxed is the best suggestion. I know it's easier said than done as I was very freaked out when I first found out. If you are too worried, email me tomorrow I can tell you know my results after I see my OB.