At least she kept going till they found your bubbas heartbeat, my Dr couldn't find my babys at about that stage and she just said it was normal and not to worry about it. I freaked out for like a week afterwards :/ Lol
It's because your baby is so tiny. Don't worry, once he/she gets bigger it will be much easier
That's happen too me 2 weeks ago I was about 30 wks butt my doc said it's ok when that happens the baby's back is toward my back so it's harder to get it I was really scared butt this time I went to the doc it was fine your baby just moves in diff position it'll freak you out
Thats happened to me multiple times. My first loved to hide and t took a good 3 to 4 minutes for the midwife to find the heart beat. This time around I am goig to a teaching hospital doctors office place. Well the residents arent vey good at locating this ones heartbeat either until he doctor comes in and makes them look like idiots lol.