I have crapping pain in the front and front left of my stomach and medium red clumps of blood in my stool . At around 3:00am this morning after I ate two pop tarts and a 20oz bottle of strawberry milk I was in the shower and started to get severe crapping and nausea . I was also constipated. The crapping got so sever and I got light headed, that I had to sit on the shower floor for a few minutes. I did not want to move in fear of falling, so I finally passed my stool. It was medium to dark brown with some light olive coloring and was hard at first, then dark brown diarrhea . I woke up this morning around 10:00am and felt like I was having a bowl movement, but it was bright to medium clumps of blood and mucus . This has happend two more times since then and there was no stool at all.