I took Alli for 5 days I woke up in the middle of the night with bad pain I went to the bathroom but nothing happened. I walked back to my room and passed out in the hall way. When I woke up I had sever belly pain and went back to the bathroom, i released bloody stool. For the next 3 days i had bloody stool. I went to the dr and they said nothings wrong- i mentions I took Alli and they blamed it on that. Is that a worse case side affect? I know i need a second opinion but now i'm affraid to take Alli.