Is the pain in your stomach or down lower, in what I call the gut? Your pain might be a spasm, and it can be so severe to make you feel like you might pass out. When you are flaring, it can be triggered with just one bite. Did you know eating stimulate your bowels? Most people wouldn't even notice, but that's why so many of us avoid eating if we know there are no convenient bathrooms available! Anyway, what you describe is pretty typical UC, unfortunately.
Anemia leaves me tired and cold all the time. If you are anemic, try Slo-FE, it's less harsh on your gut because it's slow-release. Regular iron supplements are very irritating.
49 year old female attorney, diagnosed UC/pancolitis 1985, no surgery but much suffering.
Asacol/5ASA 6x400 mg maintenance for 20+ years; use prednisone & Rowasa for flares.
August 2008 sought care of naturopathic doctor. Food sensitivity test showed wheat/gluten, other intolerances; started diet without gluten, soy, dairy, tomato etc. Replete$$ probiotic powder, then Forte, now a stronger one (50 billion). Doing much better, but still having some bad days.