I didn't read all the comments so I'm probably repeating what others said.

Experience is worth MUCH MORE than a certificate in the Web Design/Programmers world. You learn nothing in school compared to the real world. I doubt very much your teachers thought you about Web Standards?

To get experience, start doing freelance. The best way I found was by going to places like RentACoder. Keep the job you have and do this stuff on the side.