Feeling Worried Now..

This week supposed to be my 8th week.. And today went for the vagina scan, doctor say baby didnt grow and is still at the 6th week sizes.. Is ny 2nd time pregnancy, my 1st time was also like tt, a chemical pregnancy with onky yolk sac and no growth.. Doctor say go back next week to scan again n see if is necessary to carry on if baby is still not growing.. ?? I m feeling so lost and worried. Been hoping is a rainbow baby.. But is letting us disappointed again.. I dont wanna give up yet, and praying for a miracle happen in this 1 whole week.