Might be pregnant and up for promotion?

My husband and I have been "casually" trying to get pregnant for the last few months. We haven't put a lot of effort in it you could say. My company just realigned and I have been offered the opportunity to apply for a new position. This would require my family to move and I would be busy on this project for the next year. I am not guaranteed the position but I have been strongly encouraged to apply so I would say it is a very strong possibility. The problem is now that I may in fact be pregnant. It is too early to test, but I am just anticipating what I should do if I am. I want to do the right thing as this a multi-million dollar project I would be working on and I don't want to get it move out ther and suddenly announce guess what folks I'm pregnant, but at the same time I don't want to sayu anything until after my first trimester because so many thinsg can happen....I know if I was pregnant, I can do the work and will still work just as hard and as well post baby, but I know it would be hard on my company for me to be out for 2 months at that time too. Has anyone been in this position before? How did it work out>