Avoiding a Wardrobe Malfunction

I go back to work in 4 days and I can't zip my pants.
The skirts I can zip, but they are clearly too tight.
Suzi Chen at Special Fried Rice posts her meal plans each day as well as her weight loss and exercise goals. I find this quite inspiring and enjoy reading her blog each morning. I don't think I am so brave, but I did buy a pedometer and am walking every day. Today I walked 2.14 miles, 4530 steps. I read I should be walking 5,000 steps so will finish that out today at the mall when I go buy some bigger pants. I would hate to bust a zipper my very first day, after all.
This sucks.