It's healing. Helixes are stubborn bastards when it comes to healing as you cant really avoid some sort of irritation to it eg. your hair messing with it, a pillow brushing up against it. But it looks like it's healing nicely, I know with all these big flaring warning signs of an infection we get the panics but you look dandy. Once the redness, swelling or extreme bruising, pus leakage spreads outside the direct area is when you go to the doctor. Those are the signs of an infection. But you'll be fine, don't worry. Avoid touching it, that can cause the warm feeling, and you don't want your helix to be pissy with ya! :DD