Quoting Ryan's Mommy [9wks]:" I've been having spotting on and off. Yesterday it was a little red, but has been brown for the most ... [snip!] ... a heart rate of 169. She said it was a threatened miscarriage. Does anyone have similar stories with positive outcomes? TIA!"
it's really common to spot in the first trimester (50% of women do it)... w/out it necessarily being anything serious, although it can become serious if the flow increases.
i've been doing the same - very lightly for over two weeks now, but my HCG levels are fine (i'm seven weeks right now) and the spotting is decreasing a lot in the past two days.
i'm fairly optimistic that everything is fine.