Ashley, I'm so sorry you are having these problems. It seems to me that since you don't have a colon, you will be going to the bathroom more frequently than the average person. That being said, you shouldn't be going THAT often! Maybe, since your intestines have gone through this "shock" they need to be "babied" a little. Eat things that are easy for your intestines to digest.
I am prone to partial bowel obstructions. I have an ileostomy, also. Anyway, when my system has gone through a lot, I find it best to stay with a softer, "mechanical" diet for a while so that my intestines can "heal". I also chew my food very well. I eat soups, soft things like eggs, meat cooked in a crock pot, mashed potatoes, veggies cooked well, cereal with milk or hot cereal, etc. I try to avoid fresh fruits and vegetables. (I"ll eat fresh veggies if they have been cooked well...no crunch.) I avoid corn, peas, anything with an outer casing or a crust like fired chicken. I eat canned fruit. I only have to do this for a week or so. Maybe try this and see if things settle down. Then add things, a little at a time, until you are on your regular diet.
Also, try Desitin (sp) the diaper cream for your sore backside. I think it would help to heal it as well as be a protection to your skin. I hope all settles down soon.