Whenever my bowel movements are moving thru my intestines, i can feel it and its excriciateingly painful like labor contractions painful. why?

Feels food in guts: You are probably describing visceral hyperalgesia--the heightened sense of gut distension & motility that many patients with irritable bowel syndrome experience, particularly at times of "mass movement." however, the same feeling may occur in response to partial obstruction (whether mechanical or functional). An abdominal obstruction series may reassure you, or may lead to additional studies.