Doppler

So I've bought a dopler to try and see if I can find my babies heart beat, I'm currently 9 + 2 days and not having any luck all I'm getting is my pulse and a load of wooshing noises anyone else used one of these? I just want to get my 12 week scan so I know everything's ok the first 3 months are so frustrating and you just worry all the time! And I am very impatient 🙈