Welcome to Healing Well! I'm glad you found us.
I'm going through something similar right now. I have a temporary ileostomy that is high up in my small intestine, so the output is watery, and I've lost 30 pounds since my surgery 8 weeks ago.
Ensure flies right through me, too. It acts like a laxative, so I stopped drinking it. So does caffeinated coffee, tea, and soda. It's best to drink water. I like Smart Water, since it has electrolytes.
Antibiotics are notorious for causing diarrhea, so you'll probably notice an improvement soon after you stop taking them.
Potatoes (baked, mashed, or soup) help thicken the output, and so do bread, oatmeal, and rice. Baked chicken is good, too. Try to stay away from fatty and sugary foods.
Lomotil never seemed to work for me, so I just take a couple of over the counter Imodium 20 minutes before eating.
Liquid vitamins and sublingual B12 vitamins absorb quickly and might help give you an energy boost. It has taken me longer to get my energy back with the fluid loss and weight loss after this surgery.
You had a big surgery, and your energy will return. Your output will thicken, too. It all just takes time.
Dx'd Crohn's in '99 at 28. Proctocolectomy and ileostomy in '06.
Disease-free, medicine-free, and very thankful to be healthy again.