Baby Shower Anxiety?

I'm super shy and am super nervous about my baby shower. I'm grateful that my MIL is putting so much effort into this and that people want to come and show their love for our girl, but I'm so painfully shy that the idea of focus being on me has me worked up every time I think about it. I get all shakey and red and feel like I need to cry when I have to open a present at Christmas in front of people...I can't even fathom how difficult this will be. And again, I'm not trying to come off wrong, I just don't handle attention well. Any advice?