Holy ****, those crunches are all wrong!!! Ooh and the bloody ****s could be a problem too bro. When the instructions said "mix in glass" I dont think they actually meant shards of glass were to be added for desired texture.
In all seriousness, I know its an embarassing thing but I would recommend seeing a doctor and not counting on what we say for anything that involves internal bleeding. A couple months back I thought excess protein was causing a similar problem for me except I was pissing blood. My wife (a nurse) forced me to see my doctor and he took blood and urine samples and sent me to an internalist the same day. The internalist had me drink iodine and another nasty ass tasting chemical and did an MRI (or whatever you call those scans that they do to get an Xray of your insides) and found nothing to cause any concern. A day later the doctor called back and said I had a bad bladder infection and that all I needed was to pick up a script he already had writen from any pharmacy. It was fixed in about a week. Moral of the story, It wouldnt have gone away on its own and I probably would have ended up with a tube in my dick for a couple day if I waited(he bites his fist as just the thought of a tube inserted into the shaft causes him pain).