​After it nothing comes out, we only notice blood after sex .. This past days .. My period is last sept. 20 and last for 3 days only .. And always it is not that much it can't soak a pad .. Maybe i only used 2 pads not full each day .. When i have this dischare i thought it is my period but i think it is  early to have period .. Please help me to know if its implantation bleeding or no .. When this brown thing came out i feel some cramps in my lower back and lower abdomen also .. But the brown diacharge is still not heavy .. I throw my panty liner wish i take photo  so i can show ..