Im 3 weeks pregnant and i had an appointment today with my ob/gyn to see how my blood count was…

Im 3 weeks pregnant and i had an appointment today with my ob/gyn to see how my blood count was going the day in found out i was pregnant i had really bad cramps and alot pain so this appointment was to do a follow up. The nurse wanted me to do a urine sample and as soon as i go to the bathroom i felt something driping then i realized it was blood i emidiatly told the nurse and they sent me to the ER my blood count was 238 and last time i when in it 486 i havent had any clots or anything come down the doc said inwas having a miscarriage.. i dont have pain at all it look like its my period. Wich he told me that it impossoble to be pregnant and have your period. I already have had one miscarriage and i didnt know i was pregnant i was 9wks and i had my period the two months and after i mis carried i was in alot of pain i dont know what to think if its my period or miscarriage im really scared!