I have had bloody stools, diarrhea, constipation, abdominal pain, back pain (lumbar area) increased urinary frequency, abnormal periods bloating overnight. Fevers and night sweats, horrible cough. None of my doctors found nothing, even made me an endoscopy.
Perhaps due to colitis or infection. Are there any foods that you 're sitting wrong? Try to follow a gluten free diet for a week to see if symptoms improve . If not , then ask to see a gastroenterologist.