Pool Colored Dress Size 18, 20 Or 22?

I am going to be in a wedding at 32 weeks (8 months) pregnant and I am a size 16 right now (6 1/2 months preg.) so I think I will be a size 20? Any suggestions? Does anybody have a Pool colored dress that would look good on a pregnant body?
Posted by Corinne; updated 07/23/09