July 4th announcement

So I just found out I am pregnant with our 3rd baby. My husband  wants to tell everyone now! (5 weeks, 3 days) I know you're supposed to wait until 12 weeks but I saw some Presh July 4 pregnancy announcements and I thought that might be cute to have my two daughters hold up a sign I made. I will be only 7 weeks then. Do you think that's crazy early? What are your thoughts? Here is the sign I made.