Hi I Was Pregnaant And Show Me Result Weak Positive

Hi i was pregnaant and show me result weak positive and 9days are little bleeding and 10th day so much bleed.then i do scan and my baby no.what is the problam.begining when i talk with my doctor my problam she gave me injection and folic acid with dupbaston tablate andtold me wait and see.in last she told your baby was gone with blood come back to her do hcg test.what i have to do and whats wrong with my problam