Period was due but only spotting on and off

Ammie
Period was due august 9th and on august 10th i started having minimuim spotting only when i wipe ( not often) only once in awhile... I have spotted like that since the 10th and still am (only once in a while im spotting) i did have some bright red blood once just when i wiped... What could be wrong? Could i be pregnant and still spot red blood?