Weddingbee boards

I am a fairly laid back person, so I wanted my wedding to represent that as well.  It is going to be very casual.  So, I am just having a MOH and no bridesmaids to keep it simple and avoid all the bridesmaid drama.  I told my MOH to just pick out some cute sundress or cocktail dress that she liked and would wear again.  However, I am gettting married in 13 days, and when I talked to her last week (after 4 days of trying to get a hold of her without success), she still had no dress.  So, that night I did some searching online and sent her an email with some ideas of dresses I liked that were also affordable, since I know she is a little strained financially.  I also sent her a text telling her I sent her the email.  It has been almost a week and I still have not heard a word from her.  Also, when I talked to her, she said she was coming in early to hang out with a friend of hers that lives 2 hours away and they are going white water rafting, and rock climbing ( I live in Colorado) a few days before the wedding.  I am a little annoyed with this since she has shown very little interest in the fact that I'm getting married, and also because I don't really want her to get hurt before the wedding.  I haven't said anything to her yet, because I'm wondering if I'm just being overly sensitive about things.  What do you guys think??