Conflicted about announcement:7w with our rainbow.

We have been ttc for our second child  for 6 years. After a fertility diagnoses we tried adoption for 3 years with no luck. We got pregnant by complete shock but I miscarried July 2014. We have been doing fertility treatments since February and got a BFP after our last IUI and I'm due in August. Part of me wants to announce to all because of the joy and excitement and support just in case we lose it but it was also really hard to have to keep telling people when we miscarried because they didn't see that announcement in Facebook. Just not sure. Any thoughts?