I don't have personal experience with this particular issue, though I did have trouble getting pregnant and staying pregnant. My well-meaning husband would tell people whenever I would have a positive pregnancy test, then I was left to tell them later that no, I was no longer pregnant and it was heartbreaking. I would much rather have kept the struggle within my own family, if that makes sense.
What I can say is this: nobody outside of your closest relatives/friends needs to know about the circumstances surrounding your pregnancy should you go this route (or any other). In fact, nobody but your husband really MUST know, though I can see confiding in close friends/family just to be able to have their support. It's really nobody else's business, and sharing your decision with them only invites them to voice their opinion.
Make the choice that works for YOU, and don't invite people to that table who don't belong there. There is nothing to be ashamed of, please don't read my comments that way, but I hope you'll make your decisions prayerfully and feel confident in them without needing feedback from other sources.
Best wishes to you!