It'd defiantly help you to record what you eat in a journal (online or paper).
Since you're at university, google to see how you can "measure" your food portions at the cafeteria... say a fist = 1 cup of food, a deck of cards = the amount of a particular meat or fish item, etc.
I'd also recommend you buy the "calorie king 2009 ed" book and take it with you on occasion to the cafeteria. That way, you could have a better estimate of your food at any given meal there!
How much sodium is in your diet? That can cause temporary weight gain, in addition to excess water intake and increase in any kind of exercise program (check the sticky "Fluctuations in Scale Weight and Water Weight" at the top of the weight loss support forum).
Keep going, you're doing great!