oh my god, I just sat down and have noticed a very similar problem. Its really really shrunken and pretty hard, im freaking out.
I dont think its pe related, because I woke up this morning, next to a girl I usually mess around with ( I dont remember the night, I was drunk), and my dick was sore, and there was a thin 1/16 inch long purple mark right under my glans left of the frenellium which was particularly hurting, more like a sting feeling. i had random hard erections throughout the day, and right when I sat down I was looking at my penis which seemed much fuller and heavier than usual, definitely an improvement, so I was smiling, and then a few minutes later it shrunk and got semi-hard. Im about to take a warm bath to help