19 years old Colitis+ Colonoscopy several months no answer

[DanielPjr]

Well in June of 2009 i got a UTI infection, i went on cipro for 7 days and it cleared up =) 2 days later i got a naty bump on my leg, i went in to have it checked out, turns out i had a MRSA infection, so i went on 7 more days on antiniotic this time sulfa. Since then i have been having abdominal discomfort, no cramps, no blood, no diarrhea, ive been experiencing mucousy unhealthy looking stools. When i started taking an"Alive Multi vitamin" and the stool looks a bit healthier to say the least, however i do have this constant tightness and pressure in my abdomen, i had a ct scan that showed i had colitis, the pressure isn't painful its just discomforting and it never goes away it is so constant it doesn't ever flare up or get worse it is always there, so i waited about 3 months to finally get a colonoscopy how ever the results came back normal, i was relieved yet saddened, I have something wrong with my intestines, but all these tests where coming back normal besides the ct scan, Its getting really heard to concentration in my classes because of the discomfort, i got a job and which takes my mind off of it but in the end the pressure is still there. i know I'm not crazy and i strongly feel there is something wrong with me. it just bugs because my doctors havnt done anything about after the colonoscopy it was like everything fine. I was just wondering if anyone have any recommendations i should ask my doctor about.?  If i can figure out whats going on it will make the best holiday season i ever had.