I'm also a 19 year old college student (girl, FYI) and I actually had a very similar experience the past few weeks that just seems to be going away now. I started getting hungry ALL the time and was eating a ton more than usual, but the hunger was still there. I don't know if you have bloating issues at all, but I do and that was the worst part; I would eat and eat and get bloated and extremely uncomfortable, but still feel hungry. My stomach has also been hurting more recently, and I realized it's because I was eating a lot more of the high-fat foods I keep in my dorm room (like nuts, almond butter, coconut oil, canned salmon, full fat cottage cheese).
Unfortunately, I don't think I'll really have any helpful advice. Plus, the problem just stopped a few days ago after lasting for a few weeks, so I can't really say for sure that it's gone. My CF doctor did have me increase enzymes (I used to take 7 Zenpep with meals and now take 8), but since I generally adjust how many I'm taking based on what I'm eating I can't imagine that would have solved the problem. My doctor said they usually only see phases of ravenous hunger like this in kids who haven't quite figured out how many enzymes they should be taking.
I've had this problem on and off the past year, and I noticed it started this summer right after I began taking birth control pills for low estrogen levels. I stopped them about two weeks ago, so I'm kind of convinced that's what's been helping. I don't know if you take any BCP's, but I thought I'd mention it. Otherwise make sure you're getting regular exercise and, most importantly, sleep! Sleeping deprivation has actually been found to lower your levels of leptin (makes you feel satiated) and raise levels of ghrelin (which makes you feel hungry).
Good luck, and if nothing else, know you're not alone! I understand a lot of people on this site would love a bigger appetite, but I completely understand how miserable it is to always be hungry (when you also have a stomach ache and, at least in my case, feel bloated).<strong></strong>