spotting

Okay Im pretty sure im in the same boat, The first day of my last period was October 7,09 and it is now October 25,09 and I started spotting yesterday and it was pink but only when i wiped, and pain also followed in my lower abdomen, and now today still abit of pain here and there, but now some brown spotting on my pad, it hasn't even been that long since my last period, my next one isn't due until Nov 11,09 and I wanna know what the heck is going on, Too early for a P test, all though doc took one back negative, soo going to take one through blood test, But also I have this thing called a fertility calender online and apparently i am ferile as of today, and am wondering is all this just because im fertile? or am i pregnant? about to misscarry? anyone no what this cood be? i need to get that blood test done tommoro but im not sure if i shood TTC while spottin cause i dont know if i have Conceived already? my gooly i better stop and take a breather, i think im over reacting and causeing more stres well g2g hope to get some replys:) it wood be great! whether bad or good i just need some answers. thanks