Home Fetal Doppler

Has anyone tried fetal doppler’s at home to find the babies heartbeat?

I bought mine on Amazon during my first pregnancy and I was able to find my first child’s heartbeat very early, at 8 weeks.

I’m currently 8 weeks and still haven’t been able to find it. I saw the doctor last week and had a transvaginal ultrasound and everything was perfect.

How soon were you able to find yours? And if you still haven’t been able to find it, how many weeks are you currently?