1. Tell ONE trusted friend
Find ONE single person that you can tell. You need to be absolutely 100% sure that this person will not tell anyone else. This will help a lot because you can keep that person up-to-date on news and get a little satisfaction out of that.
Try telling someone that knows few other friends/family of yours. If you do not have anyone that you feel can keep your first trimester secret, just skip this altogether, but I bet you have one person you can trust.