There is a sense of fellow-man concern that brings with it some hyperbole in the hopes of being more convicing, but please know it is well-placed.
I understand your position regarding a willingness to be engaged in the process, rather than dishonest, or harsh, as you feel comfortable with a balance of limited risk. However, I do think there is valuable advice that is a common thread in the other posts - don't rush in, chase her now, and/or overreact. In my opinion, it IS important that at this point you let her reach out to you for a variety of reasons. How you respond here is an important move for this stage of a relationship.
I also think it doesn't seem out of the question to get an over-the-counter pregnancy test (just get one, and happen to have it once you reconnect). That gets you to next point, and then you go from there - determining if it is indeed yours, etc....and until then holding off on filling up the nursery. My instincts make me think she is either faking pregnancy, or it is by another man, but feel there is no need to overreact or believe the worst at this point. I am interested to read more as the story unfolds!