Well.. Of course I am. I noticed a single small red bump on the head of my penis a month ago or so.

It's on the left side of the head about halfway down from the tip to where the head meets the shaft.

Only within the past few days, the small red bump turned into a pin-sized hard black scab. The bump wasn't opened or anything, so I don't see a reason for scabbing.

Should I be as worried as I am about this?