Even then, a miscarriage is like and extremely heavy period. It can start as spotting, but then turns to extremely, extremely (in most cases) heavy bleeding. I'm talking, when I had mine, I had to change my pad every 20 minutes.
If you think you may have been pregnant, you could always take an hpt to find out. It doesn't sound like a miscarriage if it's been a while and no more blood.
Have you ever spotted out of the blue before? Have you started a new bc or been under a lot of stress? There are lots of factors that could make you spot. But if you just spotted the once and it hasn't happened again, most likely you have nothing to worry about.
I wasn't trying to imply I was laughing at you. Just something about it struck me as funny. My apologies. :)