I have been having some very concerning problems with bowel movements for the past few months. Lately I have had either very dark and tarry stools or very thin stools that have bright red blood on them, and when I wipe there is sometimes bright red blood. The BM are not usually formed and sometimes have a very foul odor. For the past week or so I have noticed what appears to be a great amount of pus or mucous, also. I generally have 2 BM a day and seem to have developed what may be an external hemorrhoid. I am trying to avoid going to a doctor if possible but if it is serious then I will have to. I'm a 21 year old male, I drink plenty of water and have tried adding more fiber to my diet but it has not seemed to help. Before all this I had a problem with diarrhea almost every time I used the restroom. I've started to feel sluggish and the whole situation is really starting to worry me, so please help!