Hmm.. Can it be??

Can I be pregnant?? Woke up this morning and when I wiped.. there was brown blood only when I wiped.. and just a dull light pain on my lower back on the right side!! AF is due on November 25.. so I am 2 days early and this is nothing like AF.. AF is usually right on time and I spot bright red and I have the worse pain in my lower back where nothing can help it. I am hoping that this is implantation bleeding. I never had it with my boys. If I am pregnant.. then my EDD is August 1, 2012 and right now I will be about 4 weeks!!!