jen, i felt exactly the same thign i stressed everyday and got teary praying for bub to kick - at our 18 week scan we saw all ok - thats what you have to focus on!!!
if there was somethign wrong you would know it!!!
i have only just felt a tiny kick and im 20 weeks tomorrow.... i knwo its hard but dont stress.
trust that when the time is right bubs wth kick up a storm! hugs!