Sounds like you have the perfect attitude so I am sure you'll be fine, best of luck with it! Weddings are huge pressure, we grow up with it ingrained in our heads that we will be a princess on our wedding day, the belle of the ball (thanks Disney!), not to mention everyone saying 'ooo I can't wait to see the dress'. It's a lot of pressure! I'm a wedding photographer, so I see really closely my clients fears, and actually, when one of my brides is a bit bigger I try to make sure I can be a confidante, as a bigger girl too.
I first lost weight with SW three years ago when I got "too big" in my eyes (a trip to the east coast of the US was lethal!) but also the doctors were threatening to take me off the pill, and I don't want kids! I lost three and a half stone and felt great, but the last half was quite a slog, so soon after I put half a stone back on and happily stabilised. Then early last year, another stone crept on after a few amazing holidays, including my engagement. Funnily enough though I decided NOT to lose the stone again for my wedding, I was generally happy and when I tried on the dress I went for, I felt amazing. I had a bit of a wobble a month or so before the wedding "my arms need toning!" but hey, in the end I didn't even wear the cover up bolero I'd bought, as I just felt so great. Wedding, honeymoon and house move three months later, I have put another stone back on, so I am back here now, before I am back to square one. But putting on that dress and marrying the love of your life - no extra dress size could make you take that feeling away
I'm excited for you and Tatabubbly - amazingly exciting times...