1. Can you just not have your middle name said for the ceremony? I didn't even consider it necessary but then I have no idea, is it a legal thing? And if it is, I'm wondering if it's something you are worrying about too much?
2. All i can recommend is practice. A lot. It will make you so much more comfortable and confident. Record it and play it back to yourself, look in the mirror too. Take a few deep breaths before you start.
3. I doubt you will be ignored, you are the bride! And even if you are then maybe just go up to people to thank them for coming and you will probably be stuck for ages talking to everyone. Ask if they're having fun, what they like best about the wedding etc. Have a few champers and have fun, it's your wedding day! :) Also, maybe take a wedding planning time out and take a bath or do something non-weddingy like watch a funny movie, go for a run, etc, you might be putting too much pressure on yourself. I have anxiety and panic attacks so i try not too think too much about things and if i start to get stressed i go do something else and come back to it later. :) Good luck!