hiya
im going through the exact same thing.
i started this spotting two days ago, and now that im in my third day it has stopped but i think it will return tonight as it has previously, i have 2 kids, my first was planned, my second wasn't and when i was due a period at that point i remember spotting, but took no notice, 4 weeks later i found out i was pregnant. im so worried incase it has happened again as my son is only 5 month old.
i really do hope its just one of those things.
after searching the internet for a while all i could find as reasons for this was, "cysts" or "implantation".
i hope everything works out and gets back to normal soon 4 you as i know exactly how you feel.
cheryl =]