I’m 11 weeks today and can’t find baby’s heartbeat on doppler

Sam • Baby boy #1 March 20 2018💙💙,Baby boy #2 October 16 2020💙💙,Baby girl #3 May 3 2023💗💗 Baby girl #4 Due January 18 2025 💗💗

I had an elective scan at 10w 4 days and saw baby was doing well and now today my OB couldn’t find baby’s heartbeat