I may actually be going crazy!!

I'm pregnant with my third (and only planned) child. My last pregnancy was fine until we learned that he had Spina Bifida. He's a healthy, active kid (the opposite of what we were told to expect). 
When we started trying for another I was terrified. I've been on prenatals and extra folic for months. But my doctor so far hasn't treated this pregnancy any different than any other. Which is making me a nervous wreck.  I'm 10 weeks and he hasn't done an ultrasound yet. He's waiting till I'm 12 weeks. He hasn't sent me to a high risk specialist yet (which I was pretty sure I was supposed to get immediately referred to).  Am I just being ridiculous?!  I just want to see if everything is ok!!