My Flip-Flop Fixie Fiasco - 6 days later

So I came home last night, stripped down for bed, and happened to catch a glimpse of my tushy in the mirror. There's not much to see, but what was there was capped off with a new bruise - right at the base of my spine, between the top of my butt cheeks. Kinda scary since there was also some swelling there, and I didn't think I had made contact with the pavement on my rear, just my left side. I went to the urgent care clinic this morning and they took a couple of x-rays and the Doc in a Box is confident that nothing is seriously wrong.

Here's the latest picture. You'll notice that gravity is pulling the blood down. I'll spare you the pic of the bruise that is between by butt-cheeks.