Digestive problem and sleep deprivation.

I have a history of digestion problems since childhood. Recently I had got gastric and burning sensation passing stool. So I started eating from time to time properly so the gastric problem went away. But now I got rotational shift job from 10 PM to 7AM for two weeks hence what I did was in-between 2am I eat something like fruits and sleep at 7 am get up at 9Am and eat breakfast as in my home they don't make breakfast early. And sleep again at 10 AM and get up at 2PM have lunch this is my routine... But what is the issue is that my stomach keeps making sounds in night it doesn't seem serious..and in morning also sometimes after eating sounds + a lil bit constipation sometimes. What to do.I really don't know how to survive these night shift and I have sensitive stomach too. Please advise..