So i purchased one of those at home fetal dopplers from amazon and it was a lot harder to use than i thought it would be. The YouTube tutorials make it look so easy! I’m 12 weeks 1 day and can’t find the heartbeat. I couldn’t find it last week either and then went to my NT Scan and baby was squirming and kicking away. Definitely causing more worries than easing my fears. I purchased it due to having a MC with my first pregnancy at 10weeks. This is just my experience but my suggestion is NOT to buy one 👎🏻