Movements and kicks

Hi everyone!

I am naturally an anxious person. This is my second pregnancy and I am bigger than I was with my first. I’m currently 18 weeks. I literally haven’t felt any movement and can’t find the heartbeat with the at home Doppler (now I know that doesn’t mean much) however I am just quite anxious that somethings wrong.

Has anyone else experienced not feeling any movement or flutters until later in your second pregnancy? What has your experience been?