Hi. Thanks for your query and an elucidate history. The history of passing blood and mucus in the stool along with nausea in the morning and afternoon is suggestive of an intestinal infection going in more towards gastroenteritis. Yes, you need to see see a doctor as he can see your vitals like pulse, blood pressure and temperature and examine the abdomen and also give an order for the investigations and give you prescription of medicines. I would suggest you the following: Tests of blood, urine and stool ( electrolytes, urea, creatinine, sugar ) Ultrasonography of the abdomen. Antibiotics with metronidazole, probiotic, activated charcoal tablets ans symptomatic and supportive treatment as per the vitals and investigations.