Last question 1st. Pregnancy changes everything in relationship dynamics. Especially when you're under age.
Unfortunately, you're going to have to let this play out between her and her boyfriend first. If she is indeed pregnant, "They"; and hopefully their parents, have alot of decisions to make.
If she decides to keep the child, it could push you out of the picture.
Be patient and be supportive. If you get the opportunity to be with her after the dust settles, you will have to be very sensitive of her current situation.