Full ?

i'm always full, bloated, have irregular bowel movements(constipation and diarrea on the same day), and g A LOT(it's really embarissing)-i eat really healthy, don't eat a lot of salt-get lots of dietary fiber(bout 40 grams a day). I heard drinking water helps get things moving but i'm sooooo full i can't seem to get myself to drink enouph to be of any help. ANY SUGGESTIONS are REALLY APPRECIATED!!!