I started bleeding on the 22nd of September at 3am after already having a cycle earlier this month no cramping or fever it seemed like it stopped and then like 10am it became heavy around 3:30pm I went to the hospital they said my potassium and hemoglobin levels were slightly low and my Hcg was negative they did an exam and said my cervix is closed and it was probably a 2nd period which does not and never happened except for once in my life and it was spotting not as heavy as it is now its been 2 days and im still bleeding ive looked things up because the hospital just left me uncertain and uneasy and it says it may be a threatened miscarriage because my cervix is closed but how could that be if my hospital blood hcg test was negative..I need any help or answers anyone has for please feel free to respond.