My husband are I are trying to conceive. I ovulated on July 25, and started to see brown spotting on July 31, and now its a heavy flow. Not like my normal period though and no other period like symptom, although I have had severe lower back and lower abdomen pain. My periods are always on time, and I just dont know if my periods has come a week early or if its implantation bleeding. I have taken 3 test, and they were all negative... please help!!