15 weeks and scared to try home fetal doppler

UPDATE: still couldn't find the heartbeat but I was able to get into my amazing OBGYN today and everything is great !! HR is still 157 so next we hope to find d gender I'm so anxious I'm curious as to what it will be ??? What does everyone else think ??

I don't go back to OBGYN till the 19th and I have an at home Doppler but I'm terrified to try to hear the heartbeat:( I used to with my daughter but I don't know and I just wanna know everything is ok , I feel like it's so far away :(