Ahhhh girl!! Time to sit back, relax and take a deep breath. Your wedding day is almost here, woo hoo!!!!!!!!!!
First of all, you're beautiful, so don't ever forget that!
Second of all, don't worry about your dress so much. It will all work out in the end. I had problems with my aunt making mine, but it did work out. If you really want to have the dress taken in, then insist on it. Just don't forget that you will have to sit down in it at some point, so the little extra room just might actually be a blessing. I could never understand how those girls with the skin-tight dresses sit...maybe they just stand the whole time?! lol
I can't help you out with TTD because we never did one. I do regret it, but I can't change that now. I think you have a great idea to talk to the photog and explain what you want. I didn't think of that actually and I didn't choose some of my pics either because I didn't like my arms. You WILL NOT look like a beached whale!! And if you think you might, then don't do that pose, try something different. (I honestly couldn't see myself either in that pose on top of my hubby - eww!! lol)
In the end, please don't stress out too much, you're almost there! You're going away to get married to the love of your life who loves you for who you are, not what you look like. Sit back and relax and whatever happens, happens!