My period is not due till next week.. 6-7 days approx. I started bleeding very lightly three days ago. At first it was a bright pink, but very light.. not enough to even use a tampon.. Over the last couple of days it has remained very light, lighter each day, but the color has now darkened to a dark, dark brown. I have had very light cramping compared to the cramps I get with my regular period. I have felt very tired, but that is not always an uncommon thing for me since I do not always rest well when my husband is working nights which he did this week. I did try a test after the first day of spotting, expecting I might be pregnant, but it was negative. I am going to try testing again, but I am not sure with my period still being several days out, if it would tell me. If it is not the possibility of implantation bleeding, what could cause this? I am just trying to decide if I should wait it out, or try and get an appointment for this to determine what could be causing this bleeding.