Iam pregnant my doctors say according to my LMP I should be 7 weeks pregnant but on the ultra sound ...

Sadhana
Iam pregnant my doctors say according to my LMP I should be 7 weeks pregnant but on the ultra sound the size of the baby is two weeks late that is 5 weeks pregnancy he asked me to come after 2 weeks for reevaluation. Iam nervous if everything is fine or not