Hi all ! I am 8 weeks pregnant 🤰 and I had an early ultrasound cause I had some intense pain !! The…

Hi all ! I am 8 weeks pregnant 🤰 and I had an early ultrasound cause I had some intense pain !! The doctor says that she can see twins !but one is bigger than the other ! One is measuring 8 weeks and one is just 7 weeks ! She says that we should keep an eye to it ! And asked me to come after one week for an other scan! Is this normal ? Or I can loose one of the babies 👶 I am first time pregnant ! And I am so scared :/