Nothing on first ultrasound

Natasha • Christian, Happy Wife, Mama of 4 Girls, Expecting Baby #5
Hello i have 2 healthy living children and had a miscarriage nov 2013 went for my first doc and ultrasound appointment today and they couldn't see anything on the ultrasound it could be to early but still scared me I've been having cramps so i guess im just nervous this time. Has anyone ever had a ultrasound be to early and couldn't see anything?