I have a severe stutter and got married a few years back. I was terrified of reciting my vows too. And I stuttered. I blocked on several words. But my husband just made silly faces at me while I said my vows so I started laughing and it didn’t matter. Everyone at the wedding knew I stuttered. My husband knows I stutter. The officiant breaking up my part into 3-4 word bits helped a lot too. Some of it I pretty much whispered. It all worked out in the end. :) congrats!