Hello Ma am welcome to health care magic, I have gone through your question very diligently and I really appreciate your concern. Looking at your description, it might be related to diarrhea or blood mixed with diarrhea. Excess diarrhea may cause dehydration which can lead to dark coloured Urine. Blood in stool or urine is a matter of concern, so I would advise you for a battery of tests like blood for hemoglobin, CBC, liver function test, stool test for ova,cyst or protozoa and occult blood and urine routine and microscopy test to rule out blood in urine. You may require a course of antibiotics for diarrhea which might be related to acute gastroenteritis or food poisoning. I would advise you to take plenty of fluids including ORS, 4 to 5 liters a day to maintain good hydration and urine output. maintain good hygiene, wash your hands with antiseptic soap or solution after going to wash room or before every time you eat anything. Hope I could answer your question, please feel free to ask for more clarification, I will gladly answer you. Best wishes