I also can't wait to see you all on Friday!!!
I had a similar thing happen to me...My Bridesmaid and oldest friend got engaged almost a year after me and scheduled her wedding for just few months later which was a week after my Legal Ceremony.
However... I was not upset....again this is just me, I'm a pretty positive person and I do not know your friend, so please don't take offence...
Like your friend, I believe they are two separate happy events and one has nothing to do with other. I do not think my friend was jealous or trying to beat me down the Isle. If anything she was missing out because I didn't have as much time to help her as she had already helped me. I'm sure that this just happened to be the time that worked for her, her FI and their Family.
I also don't think her wedding over shadowed mine. We have a lot of similar décor items because we have the same taste but I now have the opportunity to improve on mine. We have a lot of the same friends as well. We all had soon much fun dancing til dawn! When it was all over everyone kept saying how they just couldn't wait until My wedding in Punta Cana so we could do it all again! If anything it was a jump start to excitement of going to my wedding.
I would say let her have her day, maybe it will be a good prequel to yours!. It's not Nov 11th...it just happens to be a few days before. Your day will still be your day. The legal ceremony wont be any less special to You and Chester if they get married before you or after you. You have to think about if getting married a few days apart is worth a friendship.
That being said I do not know your friend and I can only speak from my own personal experience so I hope you can work it out! Stay Positive!!!