Will I gain weight in two weeks if I stop running?

At present, I run about five miles per day, and I generally consume about 1,900-2,200 calories a day. However, I have two weeks left of summer break before I go back to school, and I'd like to change my workout regimen by running 5 miles perhaps only every other day (approx three to four days a week). I would return to my usual regimen of 5 miles/day about two weeks from now. If I don't really alter my diet, am I likely to gain a lot of weight?