Stop harassing me!!!

I swear I am going to rip my hair out if my mother in law calls me one more time asking if anything has changed. She calls at least once a day and texts me every two hours!! She is one of the three people I want in the delivery room with me when it is time, so it's not like I'm going to forget to tell her. I'm 39 weeks and I do tell her when something does change or progress, but it frustrates me when she constantly badgers me. I don't want to be mean because this is her first grandbaby and I know she's just excited, so how do I ask her to stop with the constant harassment without sounding mean? :/