[Harmony♥]

Your thoughts and concerns are very reasonable. Given her history, it seems very plausible that she could be using her pregnancy as way to say "Hey, this was meant to be. We're going to get married now". As a friend, of course you have every right to think this, or even voice those concerns to her. But, then again, she's going through a difficult and scary time as well, so also remember that being there for her is going to be your best bet as well.