Pregnancy anxiety?

Marie
I'm due on July 11th, I'm 15 weeks along, but for some reason I don't feel like there's anything going on in there.  It's probably just pregnancy after a miscarriage jitters.  I scheduled an appt for an elective (out of pocket) ultrasound in two days.  My boyfriend keeps assuring me that everything is fine (I'm sure everything is) but I just want to make sure.  Has anyone been feeling some sort of pregnancy anxiety?  How have you calmed your anxiety?