confused

Iris
1 week ago i found out i was pregnant on monday i went to the ER because i was spotting light red and i was scared due to having a miscarriage 2 years ago the Dr said everything was okay yesterday i went back to the ER because of the same problem and told them i was 6 weeks and 3 days when they did the vaginal ultrasound it shower like if my baby was really tiny and i was 5weeks and 5 days and heart beat at 72 im kind of scare but on monday i did blood work and it showed i had a 8075 count and when i did them again on thursday it showed it was 14134