i got my period today, 3 days early, but after a couple hours it stopped. im worried. my periods are usually regular. this past month the only sexual contact i had was getting fingered. the boy i was with did cum, but his hands were dry (he wiped them and waited) before he touched me. ive been having PMS symptoms (acne, moodiness, bloating), but not pregnancy symptoms (no fatigue, frequent urination, nausea or vomiting) i have no idea about by BMR;i have never calculated it. im worried that im pregnant even though i know its virtually impossible, but I ve heard this could signal implantation bleeding. what is this and why is it happening??