What is THIS!?!?!?!?!

What in the world am I doing with a blister??? I got in the shower this morning and OUCH!!!! The back of my heel hurt!!! I've had blisters from wearing high heels or sandals before....but NEVER from running!!! And we ran a SLOW, easy two miles. I had my good, expensive, fancy running socks on and everything!!! I know you really all care about a blister on my foot but it IS part of this road that I am on. The road to being a runner!!! Although I really hope it's the last blister I ever have...I'm pretty sure that it won't be.