I'm so sorry for your's and your wifes loss, it is such a difficult time in any relationship but good on you for trying to understand more of what your wife is feeling so you can better help her. We are complex characters, the best way to describe how I felt after all of my miscarriages was 'someone had wripped the carpet out from under me'. We had started to make plans, clean out the spare room, get all the baby stuff out of the roof, get the cot back, how would I get my son to kinder with a newborn, what about swimming with my son I wouldn't be able to get in the pool with him. When we found out that our baby was an angel that all stopped, really suddenly with no warning.
You both need to grieve but in different ways so take the time to sit and chat with her about how YOU feel, she may then open up and tell you how she is feeling.
Most of all be there for her. You don't have to say anything just hug her and tell her how much you love her and that you are there for her, the future will take care of itself.