After losing Noah, I spent as much time with him as I could, then when it was time for me to leave the hospital, I couldn't get out of their quick enough... all I wanted to do was grab my older 2 children and never let them go. I have moments now that I become very over protective of them, but I am more so over protective of Harrison. Harrison was conceived 3 months after I lost Noah, and he was born the same month that Noah was born in. Harrison was born 17 days before the 1 year anniversary of Noah's passing.
For a little while there, both my DH and I would slip and call Harrison, Noah.
I don't think I will ever get past the over protectiveness, and I don't think that is such a bad thing. My DH levels me out and tells me when I am being over-the-top, but most people are understanding, as I am sure Harrison will be when he is old enough to understand.
As Deb mentioned, our lives are never the same after a loss, there is no way they could be. Allow yourself to grieve and know that everything you're feeling you have every right to feel.
Huge hugs to you