sounds like the same 'beginnings' as i had in /96 when diagnosed (was 19 at the time). i too went on Sulphasalz, which worked quickly (within 1 week noticed some improvement), but then got a severe allergic reaction to the sulphur and had to switch to asacol. unfortunately, after all that switching, ended up having to do my first run of prednisone (starting at 6 per day and tapering off)...got a lovely moon face for my first year of University!!!
now after 10 years (and several flare ups only in the last 3 years), on pred. right now (moon face-yes, but also: energy, appetite and can function), but switching to remicade soon.
as for all your 'gross' questions- ironically, i'm constipated when i'm not flaring!!! which means even when i'm in a flare, i tend to feel the need to 'go' very frequently and even tense up like i'm going to- with only watery mucous and LOTS of blood)...esp. in the morning (gas oh gas).
since you're young and new to this- as what some others wrote, try (if you can) to stay as stress free as possible and with diet- its a lot of testing--as what works for some, doesn't for others. dairy, caffeine, alcohol, raw veggies and potato chips (or anything 'greasy') all no-nos for me right now.
good luck.
Sarah, 30 years old.
diagn. 1995 w/ UC
currently on pred. 30mg
imuran 150mg
starting remicade soon.