G.G.
If the heartbeat and blood work look good, you are most likely in good shape. When I was 8 wks pregnant with my second, I more than spotted! I bled a good amount one night (I was certain it was the beginning of a miscarriage; following one lost pregnancy, I was a wreck). It turned out to be a pocket of blood trapped between the baby and uterine wall. I couldn't believe my luck! I didn't know such a thing could happen. I spotted with my first pregnancy too but it was brown (tmi....but necessary info for you). :) I'd say cut back on your activity level and no sex until it's long gone. Good luck to you!