Made myself worried 😁

Emily
Hi ladies!
So I brought myself a fetal Doppler and in 10 weeks + 3 days pregnant. 
Well... As you can guess what I'm about to say- I couldn't find the heart beat! Tried for a good 1/2 hr. 
Just wondering if any of you had experienced a similar thing? 
I know I'm just making myself anxious and probably worrying about nothing!
Xx