Okay, so I'm a couple of days late on my period and I always have my period when it's due. I have been peeing a lot more than usual .. I had very little light brown blood when I wiped this morning, and I only have it when I wipe sometimes. It's not consistent or heavy. I took one HPT a couple of hours ago and it came back negative, but I heard that light brown blood could be implantation bleeding and is the earliest sign of pregnancy. Does anyone know what this could mean? Could I be pregnant even with a negative result? Are my hCG levels too low for the test to detect?