I had ileus with my first stoma surgery - it was awful! My latest surgery, I was so pleased when there was gas going into the stoma bag after two days - though the gas hurt so much when it first passed through my bowel!
Have you managed to avoid the central line? I don't want to worry you, but I had terrible experiences when I had one. I've had TPN via a normal IV into my arm before, which is only safe to use short-term, but I feel it's preferable to having a central line in.
Also when I had ileus and couldn't eat much, an NG tube to drain my stomach was an absolute life-saver in terms of relieving pain. With my recent blockage they had an NG tube down straight away, I kept it after the surgery just in case I had another ileus (apparently if you have one, you could be prone to more at future surgeries), and the pain this time round was far more manageable.
Hope all is well and your recovery is going smoothly.