Your symtoms are suggestive of "Spastic colon" or Irritable Bowel
Syndrome. Feeling of incomplete evacuation, bloting and gas are
all suggestive of this problem. When there is build up of gas this
can make you nauseated and even bring on vomiting
should help movement of the gas in the intestine and give you
the feeling to go to the bathroom.
If you have had these symptoms for more than six months, you
should really try to get on a regimen of high fiber diet, drink plenty
of fluids and continue excercises.
Whole grain ,fresh vegetables and fruits are very helpful.
I also want you to look into an over the counter product called
"Digestive Advantage-Irritable Bowel ". Start taking one tablet
everyday with a glass of water. This helps to regulate your system.
If you are also having some acidity problem , taking an over the
(Prilosec-OTC) 20 mg/day about one hour before
your main meal of the day will be very helpful.
Hope this helps you .
I wish you well.