CherryBlossom,
Congrats on trying to eat healthy and start college out on the right foot. I personally like to eat often - if I only eat breakfast, lunch, and dinner, I get way too hungry and binge later so I eat a morning and afternoon snack, smaller meals, and always have water with me, and I pack up my lunch and snacks every day for work. Perhaps you could get (or already own) a stylish looking bag that could actually be your lunchbox if you don't want to look so conspicuous. My co-worker has a small bag from the Met in NYC. You'd never know it was her lunch bag until she pulls food out of it.
I looove sandwiches make with deli meat and whole wheat bread, mustard or hummus, and also portion out several days worth of veggies into tupperwares or plastic bags on Sundays (that way I don't have to do it every night). I also cut up fruit or pack portable fruit in its 'wrapper' that won't get my hands sticky, like bananas, apples, peaches, etc. String cheese is a great protein and dairy fix, as is yogurt. Protein bars are ok, or granola bars - I just just watch the calorie content and the sugar content (I pick bars that have a little more fiber and protein to keep me full, like Kashi granola bars. I also love Luna bars). If you can find individually portioned peanut butter cups they are great with apple. Note: beware those small Jif cups that look like a single portion - they're actually 4 Tbsp of pb, or 380 calories. I love the idea others have already mentioned, of putting a frozen water bottle or sandwich in your lunch box - that will keep everything else cool during your AM classes.
Wraps are made with flatbread or tortillas. Flat bread is, well, flat bread, that is usually round and just a wee bit puffier than a tortilla. My grocery store carries a brand called Flat Out! that contains a decent amount of fiber in several of its flavors. You can also use a tortilla - there are some good whole wheat and/or low fat ones out there - again, just check your nutritionals to make sure it fits into whatever plan or way of eating you're doing. You can put a lot of sandwich stuff or whatever in there, and just roll it up and wrap it in some saran wrap. I like deli meat, roasted skinless chicken breast, hummus, mustard, lettuce, alfalfa sprouts, roasted red pepper, lettuce... use your imagination

Good luck!