The wait is killing me

I found out at the end of December that I am pregnant but don't want to announce until the end of next month. It's kind of nice knowing this is a suprise and no one knows. The only problem is.... my husband keeps asking. Every time I do something he considers weird. I want to just yell, YES I'M PREGNANT. But it's like every time I try to suprise anyone it gets ruined. Example: We didn't know what we were having when our boy was born, We planned and told everyone at the hospital not to say anything. NOT 2 minutes after he was born all of FB knew. So now to get to work, how am I going to announce? Send me some ideas. Something that will get everyone. I know I'm going to get his family on video chat during the announcement but I don't know what to do yet.