Km, I know my DH was very hesitant at the beginning as he was so worried that something might go wrong. His way of thinking was if something was to happen I would completely fall apart so he needed to keep it together if you know what I mean. I think men can just kind of switch their minds off, though I'm sure he is so over the moon your pregnant, but just being cautious.
Hopefully as time goes by he will start to change his thoughts. On my iPhone so don't know how to hug, but sending one your way