OP, I think what you're feeling is pretty normal. My journey was a little different than yours but it was long and filled with disappointments. When I finally did get pregnant I didn't feel joy and elation so much as cautious hope and some relief.
When we hit the second trimester I started to relax, when I hit 24 weeks I relaxed a little more, when I hit 28/30/32 etc... I really started to believe and when we brought healthy twins home I finally exhaled. And then all the real work started and that wasn't full of joy and elation either!
Don't hold yourself to any idea of what you think you should feel. Just take things as they come.
Congratulations! I hope you have an easy, relaxed, healthy pregnancy and baby.