I am also 8 weeks and 4 days. Last week I had some pink spotting and then some red. We had scans everything is good. She said sometimes a blood vessel ruptures because there is so many right now and it happens. She told me anything pink orange or brown is fine. Only to come see her again if it was bright red. Old blood means its been there for a bit. So. Maybe implantation blood finally leaking. Even implantation from the placenta does that. So that is why old.blood is "okay". Because it means its from something that has already happened. Not from something happening now.
but I know how scary it can be. Hang in there