No HB with Doppler

Aubrey • 26, married 06/2013, 1st babe born 9/17/2017 💜, 2nd babe born 4/20/2020 💜
I'm 9 weeks and had my first appointment with the midwife today but she could t find the hb with the Doppler. She said she wasn't concerned and I go back in 2 weeks to try again but it's still freaking me out. Has anyone else experienced the same and things were all okay?