Wedding Speech Powerpoint

Do you have any tips on how to not be nervous for a speech?
I’ve given plenty of speeches or presentations before, I’ve even given a speech at my sister’s wedding where there were 200 people. But now I have to give a 6-7 minute informative speech on hospital rights. I can use notecards but if I read off them too much I’ll be marked down. I’m just really nervous. I haven’t even written out my outline yet and I present it in 4 days. I have to incorporate powerpoint slides into it too. I can’t stop thinking about this, I’m so nervous. I’ve already delivered a speech in this class once and I wasn’t this nervous. Can you give me some helpful tips?
Here are some tips to help you:
Tips for Public Speaking
http://www.small-business-software.net/tips-for-public-speaking.htm
Tips for Powerful Presentations
http://www.small-business-software.net/create-powerful-powerpoint-presentations.htm
More Presentation Tips
http://www.powerpoint-resources.com/
How To Create A Best Man’s Speech In Powerpoint