I really feel for the OP, it sounds like she has had a horrible time of it. They both have, actually. One of the things that struck me about the OP was that her DH said that she 'should have asked him how he felt about it'.
To me this kind of implies that maybe ther DH doesn't feel like his feelings have been taken into account enough in all the trauma they have suffered together. Whether that is by the OP herself or, more likely, by others who have expressed a lot of concern for her but not maybe for him?
As a PP said, sometimes the women in these awful situations get a lot of sympathy, and rightly, but maybe the men don't receive the same amount of understanding that they too have suffered greatly with the loss of a child and do feel marginalised, in this specific situation.
As for going through the phone because he's been acting strangely. He has maybe been acting a bit odd because he's been really stressed out by the news. It's bound to bring up all kinds of emotions, which he hasn't felt able to articulate to the OP for fear of burdening her when she is already very stressed out. Looking through the phone was not on really, but emotions are running high and hormones are flying around.
What they need as a couple is to sit down and talk honestly to each other about how they both feel about they news. Maybe even a counselling session, to get to the bottom of their emotions at this difficult time.
OP, I wish you both all the best with this pregnancy.