Hi...welcome to the forum!
You're flaring, and from the sounds of it..it's spreading upward based on the fact of the watery stools. You do need meds..that's correct...but the doc should have put you on some right from the very beginning.
You need to actually eat more foods with proteins...add a fibre supplement to your diet rather than too many fibres from foods. That will help add more bulk and absorb the water in your colon to slow down the diarrhea a bit.
With the rectum inflamed and probably more...the colon will just try to expell anything and everything in there asap.
Eating smaller meals, but with that of bulk and protein will help. Super fibre foods such as raw veggies and fibrous fruits will probably give you more symptoms (because they're meant to loosen stools a bit), so can be counterproductive.
There is a diet called the specific carbohydrate diet you might want to check out. Some here are on it.
You should purchase a good probiotic.....there are a few that the members here use. I use Protec by Natural Factors as well as Primadophilus Reuteri. A new one that's been recently presented and used is Bio-Pro...seems to have great strains and doesn't require refrigeration.
Do you have a GI?
Make sure he/she doesn't put you on prednisone first-line. There are 5ASA meds ... both oral and rectal that you should try firstly.
Yes, I've experienced all you are having now before I was diagnosed.
*Heather*Status:mini flare June 23* 6asacol daily+ Salofalk (tapered every 4th night)
~diagnosed January 1989 UC (proctosigmoiditis)
~5ASA: Asacol + Salofalk enemas (increase for flares tapered to maintenance)
~Bentylol (dicyclomine) 20mg as needed
~Probiotic 2 (Natural Factors Protec) + 1 (Primadophilus Reuteri) at bedtime
~Natural Factors Multi Digestive Enzymes with supper
~Ranitidine,Pariet (reflux) Effexor XR 75mg; Pulmicort/Airomir (asthma)
~URSO for PSC (or PBC) 500mg X 2 daily (LFTs back to NORMAL!!)
My doc's logic.. "TREAT (FROM)BOTH ENDS" worth it !!!