What Rin said. We were constantly reminded in class "Assessment assessment assessment!!" As long as you know that you've got a solid base for the NREMT
Just give it time. There are some companies I applied for who never contacted me back and there were others who called the next day, the next week, or a few weeks later. I tried other counties and got lucky, though that process from application date until my start date which is in a few weeks...