A visit to your specialist should confirm exactly what's causing the inflammation. I would think he will do a colonoscopy to confirm it, but I don't know for sure.
In the mean time, all I can suggest is to try eating things "easy on the gut" for now to make things easier for the time being. (fish, rice, mashed potatoes, oatmeal, yogurt etc.) Maybe stay away from seeds, nuts, spicy and fatty foods for a bit.
Whatever you do, relax. There are many people on here who are great to talk to and you're not alone. Stress won't help anything. You're doing the right thing. I understand about not wanting to miss work either but you have to take care of yourself too. Popping the odd immodium to get through the day won't kill you.
Hang in there.
Chuck - 28 yrs and counting
Diagnosed w/ UC Dec 08
Pentasa 500mg 2pills-4x daily
50mg 45mg 40mg day - Calicium + Vit D
Multivitamin, vitamin C, probiotics, fish oil
"If you can solve your problem, then what is the need of worrying? If you cannot solve it, then what is the use of worrying?"