Hi and welcome!
First of all, you're going to have beautiful wedding photos! Happiness is beautiful! It doesn't matter if you lose 15 lbs, 20 lbs or whatever. Happy smiling people in love make beautiful pictures.
Speaking of that ... what if you only lose 38 lbs? You'll still be leaner, trimmer and happy, right? What if you only lose 28 lbs? You get the picture?
At every opportunity to eat ... consider what you are eating, how much you are eating and how it's going to affect your goal. Try simply putting something back. One chocolate is very good if you savour every morsel.
At every opportunity to move ... do so with vigor! Stride, swing your arms, dance while you wait for the shower to warm up ...
At every opportunity ... come to 3 Fat Chicks
You'll get lots of ideas, tips and motivation here.