Have you experienced this? Tmi

AF was due on the 10th there was no sign of her coming I woke up this morning and when I went to the bathroom I was bleeding very light which is not normal for me because normally my periods are heavy. I'm still bleeding the same it hasn't changed in flow or color its very light red it almost looks pink. Ive been having some soreness in my breast ( I never had it during my period only when I was pregnant with my first), cravings, mood swings, mild cramping, and backaches. My question is could I still be pregnant? I've taken a few test over the past two weeks and they have been negative. Has this happened to anyone else and they were pregnant?