Hello there! traumas are the one amongst many conditions which come under the heading of stress and stress decreases gut functioning, so with passage of time i believe these symptoms will go providing the fact that any visceral injury was spared. any gut perforation or spleen or liver damage was spared cause lacerations of these organs are very common in such RTAs(road traffic accidents) Nausea vomiting and cramps get explained by these stress conditions. but the color of the stool change is abit intriguing . normally our bile coming from hepatobiliary region provides the color to the stool. greying of the stool hints about bile obstruction but then that thing presents with jaundiced and pruritis. So are your scleras or skin pale and yellow or does your body itch? if it does then one might suspect CBD involvement. I would recommend U/s abdomen and pelvis for any free fluid collection abd CBD status to be on the safer road followed by the CT Abdomen and pelvis to confirm and rule out any serious trouble. Rest men while you should start symptomatic treatment for you nausea vomiting pain and crapms. get some antispasmodics( SPASFON) prokinetics( metoclopromide) and some pain killers NSAIDs. Take metronidazole 400 mg 3 times a day for 7 days and keep the diet soft and mostly fluids and easily digestible stuff to help your already under pressure gut. I hope every thing clears out for you i will be here to help if you need me. Regards Dr Shafi Ullah Khan My Patient Is My Family