Hi...welcome to the forum!
Where in the colon is your UC...limited or throughout?
Part of the reason I think you're having some gag reflex is because of the type of food you're eating...Try and eat as normally as you can...intake of protein, fluids, as balanced as you can. The snacks are good throughout the day, but you should have at least 2 or 3 actual "meals". Smaller in portion, but something you'll look forward to eating.
You should also consider a probiotic...to help keep the flora of your gut balanced...
I will strongly recommend you request a rectal med such as Rowasa if you're in the US .. it's a fluid retention enema...helps heal the rectum which the oral meds cannot reach. That might help ease some of the nausea.
As well...ask her for an antispasmodic...that as well will help some of the cramping and nausea.
I use dicyclomine...started with 10mg...it can be taken a few times a day.
Curious..what was your diet like before diagnosis?
Hang tough..it eventually evens out, but it takes time to figure meds, foods, etc to have us feeling better.
*Heather* Status..Asacol 6 (3 twice daily); enemas every 4th night
~diagnosed January 1989 UC (proctosigmoiditis)
~Bentylol (dicyclomine) 20mg as needed
~Probiotics....(Natural Factors Protec 2 or 3 + 1 or 2 Primadophilus Reuteri Pearls @ bedtime
~multi-digestive enzymes as needed
~Ranitidine,Pariet (reflux); Effexor XR 75mg(depression); 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 !!!