The best thing to do would be to go to the doctor or the ER and tell them you had a positive pregnancy test
,the date of your last menstrual period
, and that you experienced some heavy bleeding..
They will want to check your beta HCG levels and this test should be repeated in 48 hours. If the number is double then the pregnancy is still viable... If it is decreasing or showing minimal change, it could be a miscarriage.