Do you eat Bread? Stay away from wheat and wheat by products. It is in so much now that I really just don't eat bread or any bread like products. No pasta (unless it is rice pasta and make sure no wheat is used), you need to learn to read labels... stinks to have to but worth the extra time in the end.
Another option and this helps with me try taking acidipholus (a pro-biotic) daily. You can find it in tablet form at any health food store. You need a min 3 million dosage.. sounds like a lot but it isn't. One tablet once a day does it. I got a big bottle lasted me now close to 3 months for $20.00. This was recommended by my Dr. beleive it or not.
How about milk and dairy how do they affect you? Is it possible you could also be lactose intolerant? This is why I stay away from yogurt which also contain pro-biotics
Peppermint tea is good, stay away from caffine it is evil and if you drink it now stop completly (be prepared for the headache caused by the withdrawl but it goes away eventually) I now can have one cup a day no more but I had to get it out of my body completly first cause I drank 4-5 ice coffees a day during the summer and same with ice or hot black Tea in the winter. Drink lots and lots and lots of water, cannot stress that enough. Excercise will help too mainly cause it eases your stress. Try eating 6 meals, (I know you said you do and it might be harder being in college again if your on a meal plan) but do your best. Make sure your meals are small, I eat 6 meals a day every 2.5 to 3 hours. Included in them per meal is 2 oz of protein, 1/2 cup of a carb, with breakfast meal I add 1/2 cup fruit and 1 cup of veggies with noon and supper meals) The more control you can have on what your putting in your mouth the better so try to stay away from processed foods, fried foods, anything you can't identify or tell what is in it. I eat very little red meat, mostly chicken, turkey (ground or breasts), lean pork once every couple weeks only, lots of fish and sea food. I have had IBS for going on 20 years. I developed it after the birth of my children. I first blamed in on beign lactose intolerant but found out later it was IBS combined with dairy allerigies.. I eat nothing dairy at all.
Okay I hope this helps some, it is frustrating, please know your not alone with this, but most of all stay as calm as possible, try to not get stressed, develop a tool to help you relax, meditation, yoga, excercise, reading, whatever it takes.. stay calm, stress is the worst trigger.