Damn bro that sucks my head has only ever gotten dark red. You might find anti-inflammatory creams at the pharmacy next to the icy hot or something. For now just do things to get blood recirculation like heat. Go running, and eat healthy to get your heart working better.
I've heard about PE issues like this, and they always heal with time bro. Don't worry champ it'll get better just try not to think about it alot because anxiety keeps you from getting boners. One day you'll wake up with a boner, and you'll know you're on the path to full recovery.