Almost passed out

Short version... So today was my appointment and while trying to find the heart beat we couldn't hear it all we heard was my slow and steady pulse so I started freaking out and held my breath trying to "quiet" my pulse ( I know I know) just when I was about to pass out we heard it so happy don't now the rate but was fast active little bugger can't see baby till week 20 but heart beat gave me hope.... doctor use a hand held Doppler so no baby pictures yet