So, a friend sent me her old doppler last week and I hadn't been able to find the hb. I've mostly just been reading directions. Y'all... I watched a YouTube video of a fellow plus size mom and when I saw her halfway up her belly, I nearly screamed lmao. Duhhh, I was too freaking low! So I finally caught it for about a second and a half, and it definitely wasn't mine because I can hold mine for as long as I want to and it won't go away but baby must have wiggled away. Great 13 weeks present for me. I feel so relieved!