When did you hear your baby ?

Erika ā€¢ Baby girl number two due oct 11šŸ˜˜
I went to my 10 weeks appt today and we tried listening for the heart beat with the Doppler but didn't hear anything . Dr said not to worry most of the time you can't hear it till 12 weeks . But I am worried šŸ™ŠĀ