sonoline b Doppler?? 8W 5D

So I have my home Doppler and I've been trying to find the babies heart beat. I've used it before on my first child and I was able to hear hers at 7weeks, but with this pregnancy I'm hearing the sound of my ovaries, my own heart beat "in 2 different places", nothing that sounds like a baby's heart beat, which is supposed to sound fast, I've even compared all the sounds with my own pulse and it matches, so I know it's not babies heart beat, I'm having such a hard time with all the sounds above my pubic bone 😑 anyone else use a Doppler on their own! I know doctors tell you not to use those till after 12 weeks, but I know so many people who used it early pregnancy and found the heart beat with no problem, I'm 8W 5D.