For the mommas with dopplers!

Kierstin • Wife to an amazing Husband and Mommy to an amazing little girl 💕
I'm 18 weeks and 5 days and I've been using a Doppler since I was about 10 weeks. But for the past week or so I can only pick up the heartbeat in my pelvis. I feel her kick up where my belly button is but could someone tell me if it's normal to still be picking her up this low ?