Hi.... Welcome to healthcare magic. You have irritable bowel syndrom that may lead to change consistency of stool and frequency and abdominal bloting problem. Hemorroid cause blood in stool and pain during passing a Stool. Avoid constipation problem by taking high fiber foods... Warm water sitz bath also helpful in hemorroids. During periods time some amount of abdominal symptoms are present. Modifie your diet and lifestyle modifications helpful. Avoid stress and anxiety. Consult a gastroenterologist for further diagnosis. I hope my guidance helpful to you.. Take care. Thank you.