Worried the dress won't fit.

My wedding is 76 days away. My dress was tight to begin with ( a rant for another time) I was doing great the dress fit and I felt great. Now as we get closer, the stress is taking its toll. Over the last month I have watched the scale creep up. Normally this doesn't phase me as it changes so often. However, my clothes don't fit as well and I'm not doing that much different. I have increased my water intake to curb cravings, eat sensible. And exercise daily. I walk between 4 and 5 miles a day at work plus work out 3 to 4 times a week for about 30 to 60 mins.
K know it's the stress that's causing me to gain weight. I'm sc as red to try on the dress, if it doesn't fit I may just crack.