I bought an angelcare Doppler and I've used it twice. It doesn't have a screen with BPM on it so I thought I hearing baby's heartbeat till I realised it was in time with my pulse and didn't seem fast enough. I've used it low to my pubic bone pushed in near my pelvis and thought I could hear it again as it sounded like a train chugging but it doesn't seem fast enough. I'm trying not to obsess and I regret buying it now. But my next appointment isn't until 2 weeks time and id be lying if I said I wasn't a little worried