I cant remember when i found my last babies hb on the doppler but i tried for like.15 minutes last night and pretty sure i only caught mine. I know how to use it from my last baby little over a year ago. I just dont thinkk it was before 16 weeks withhim. This just normal? And where di i find it this small? I had a c-sectionwith my last son so my scar is still weird gross feeling when i touch it so its hard to try over it. Advice welcome!