nervous mommy

I'm a ftm and I'm 25 weeks and 4 days. I'm so nervous about my baby constantly!! Early on I was even more nervous was using my Doppler once a week to hear her heartbeat. Now that she's moving I'm scared if she's moving enough, I feel like it has declined a little bit and I keep getting worried but don't think I should be worried. It's never ending worries. Any other mommies out there like this? What do you do to not stress?