Hi cryket! Hang in there! I know how hard it can get, especially after a vacation. That happened to me too. Just change your work out a little, maybe get a work out video instead of the treadmill. How about adding a little weight training?
As far as the food, try eating things you haven't tried before. Go to a health food store and see what's different and give it a try. Some exotic fruits and veggies, or a different type of grain. There are so many things out thero to try.
Cooking Light magazine has a great website with food & health ideas.
Don't give up!