Fetal Doppler!!

Konnie
I just got the fetal doppler was excited to hear baby's heart but couldn't find it 😒 I'm not worried well just a little but i don't want to freak out.. I had a missed misscariage 5 months ago and I'm currently 11 weeks 3 days.. I'll keep trying I called my doctor and they will call me to make an appointment asap.. Have any of you had this problem?? It was 35$$ and I've seen youtube tutorial and they are awesome and do work..