Am I wrong?

So my “best friend” also my matron of Honor in my wedding, has just completely been stand offish with me lately. I blamed it first on pregnancy hormones. Then that I moved away and she was upset about me living farther away. But she had her baby yesterday and spoke to her yesterday as well as this morning and she never bothered to mention, “Oh hey btw I had the baby.” She finally told me this evening as she also posted on fb that she had it. Honestly, I’m hurt. I’ve asked her opinion on things with the wedding and she ignores me or doesn’t really say much. I just don’t understand it. She and her SO even deleted my fiancé on Facebook which he’s never even on and as far as I know, they didn’t have a problem with him. She’s had no issue talking about other guys I’ve been with if she had a problem with them. I don’t understand it am I wrong for being upset? She I confront her or just let it go. I honestly don’t even want her in the wedding anymore but don’t know how to tell her. Do I just suck it up til after the wedding? Help.