I'm curious, actually, why you would post this question on a message board... obviously this is nagging at you in some way. To sign up for a message board just to post your questions about the person you plan to spend your life with.
Why didn't you go into the doctor's office with her? Many fathers go to the first pre natal appointment. Did she get an ultrasound? When was her next appointment date? Generally women schedule their next appointment right then and there for, usually, 4 weeks from then.
Another thing I'm curious about... why when she started 'miscarrying', did the 2 of you go get another pregnancy test? Why not go back to the doctor? In the case of miscarriage - sometimes they get very severe. A woman can bleed to death if surgery isn't done. In fact, if there is prolonged bleeding at all, the doctor will do a D & C to remove any tissue that hasn't yet come out. This is a necessary procedure. A simple home pregnancy test doesn't do this.