Misscarage

Hi My Name Is Donaji Im A Mother Of One and in My Second pregnancy...I had a doctors app and i thought i was 7 weeks Pregnant But The UltraSound Showed 5 Weeks And 2 Days Doctor Said There Was A Possability i made a mistake or my baby is not growing properly and im at risk for a misscarage any advice anyone had a similar situation please help any comment will be very appriciated..😳