First off-- don't worry. Either way it goes, everything will be great. I agree that if you haven't taken a home pregnancy test yet, you should. You can get them anywhere and they are reliable and cheap. If you are pregnant, you may not be showing much in May. It would be the beginning of the second trimester-- when I had our baby and was about that far along I kept wishing I WOULD show, so there's no telling. You may just look a little chubby.

If you are not pregnant, you won't have to worry about altering your dress.

If you are, you are about to have the most awesome experience ever. Our baby was unexpected, but I can't imagine my life without him now. Good luck!