Hello
Bloating in the stomach and dead weight right below the sternum is associated with each other and may be due to Hyper acidity or
gastritis , so these measures may be helpful for you.
Over eating is the main cause of such symptoms , so please be careful about that .
Tension and
anxiety may be the another reasons of such symptoms ( in your case
colitis and divertculosis is the reason of tension ).
Try raising the head of your bed about 4 inches with blocks . To help control stomach acid one should not drink alcohol or drinks with caffeine in them or eat chocolates or greasy foods , or pizza or burger.
It might also help to avoid eating or drinking for 2-3 hours before you lie down.
In such symptoms for bloating take some enzyme syrup , but if feeling is burning type behind sternum , the you may need drugs like pantaprazole-d once or twice in day according to the severity of symptoms .
However diagnosis can be confirmed by upper G I
endoscopy if you don't get relief with these measures with 5-7 days .
Hope this will help you.