Really annoyed.. Am I wrong??

So me and my husband found out the gender of the baby last week, yay!! Now we are planning a reveal party for our family and friends for this coming weekend :) Well, me and him are TERRIBLE at keeping secrets so we decided we were allowed to tell people at work, but that was it. I was talking to my best friend and told her how I told a few people at work and how excited they were (in hindsight I probably just shouldn't have told her that, but she's my best friend). Well she immediately got off the phone with me and then didn't say a word to me for a few days, but was telling all of these other people how mad she was. One of them told me. So I very nicely opened it up for her to talk to me about it.. She choose not too and then two days later all was fine and she was acting the same as always. So I'm assuming all is good and she is over it, but then she confronts my husband about it at a party (I left early because hello, who likes being the sober pregnant chick at a party?!). I'm just really annoyed that my best friend is acting this way about something like this.. Am I missing something?