Hi! This disease is hard for anyone of any age but it's definitely not fun to have it in college. I was diagnosed last year, and the last two years have been the worst for me.
I'm going to echo everyone else--why not Remicade?
As far as supplements go, you could try some probiotics. There are many kinds and different ones work for different people. If you want to try a multivitamin, try Forvia--it's made for people with IBD.
Diet is different for everyone too. I'd recommend keeping a food diary and keeping track of your symptoms.
And welcome to HW!
Female, Age 20
9 Asacol, Rowasa, 1000 mg Canasa, Proctofoam, Rifaximin 2/day
Digestive Advantage (Crohn's & Colitis), 1 Florastor, 50 mg 6MP, 1 Primadophilus reuteri, Remicade (5 infusions), 2.4 g Lialda, 1 Forvia, 6 Colazal/day, 1 Anucort, Culturelle, Fish Oil, Calcium/Vit D supplement