16/17 week doctor's appointment tomorrow!

DH and I will have my 16/17 week doctor's appointment tomorrow. I call it that because the docs call it my 16 week, although I tend to measure about a week farther along than what the appointment is called. I am always incredibly nervous about appointments-we can use any prayers that you can spare. Until I hear baby's heartbeat loud and clear, it's very hard for me to relax. Tomorrow they'll only be using the Doppler, and not doing an ultrasound. If any of you moms to be or moms are out there, I think you know what I mean about being scared and nervous. Please say a prayer that baby is healthy and well! Thanks!