Indigestion. Now back to normal dose!

I am having a problem of indigestion which started one month ago.at first i got that sense of severe nausea sweating and fluttering in chest as if i will really vomit upon waking up then i stayed on the toilet trying to poop until i passed some gas and minimal amount of stool and gradually the symptoms of nausea went away within 10 min. a week later i got the same bout again but much more severe.i was lying down about to sleep when i had the exact same symptoms and stayed for nearly 2 hours.since then i've had indigestion issues (feeling nauseated. fullnees in stomach especially after meals and sometimes i would get some mild attacks of a building up nausea, sweating and fluttering).i have constipation in the form of passing less than usual amount of (thinner and darker brown stool).i had recurrent attacks of hypoglycemia too after eating in the first 2 weeks after the start of illness (i am diabetic type 1 ) for which i reduced the insulin dose to the half but now back to normal dose