In early labor and really irritated 😤.

My mother can be so freaking petty and annoying. Here's the deal... My mom has a big mouth and she posts everything on Facebook and her phone never leaves her side. When I got pregnant with my first child 3 years ago we told her and asked her not to announce anything until we told my SO mom. Before we even left her house she had already posted the news on Facebook! When we found out the sex she did the same thing. When I gave birth she posted and called her friends before I could even post anything or call family. We got into arguments about it and she said I ruined her special day. WTF!? This pregnancy I didn't tell her right away as to not ruin it and we decided to not find out the sex so she could spoil it. I started having contractions this morning and let her know because she was watching my son and she's in charge of bringing him and my grandmother to the birth. I told her I was sure it would be hours before anything started happening and not to say anything. Within 30 mins. I was receiving texts from people congratulating me so I knew right away she did it again. I wrote her and asked for her to stop and she said I'm a buzzkill and good luck on my birth because she's not coming so I've spent part of the day finding a way to get my son and grandmother here. My gma said I should call and apologize to her if I expect any help from her but I refuse. This is not about her, shes had her kids already. This is about me and my family. We should be able to announce these things first before her. My question is, am I wrong? Do you think I'm being too petty? Asking too much? Being mean just because she's excited? Or are my feelings justifiable?