5 week ultrasound...

A.
I had my 1st ultrasound right before 5 weeks.  They said everything looks good but there was no fetal pull yet!?  (They seen a gestational sac & yolk sac) I go back in a few weeks for my 8 week scan...I'm getting SOOO nervous that there won't be anything there! 😳 Is it normal to feel so freaked out?