On day ONE of a long tour I went down when I plowed into some loose gravel - caught in the dark with my "to be seen" lights going, but not my actual "see where I'm going" rig My body took most of the impact in the gravel itself and the bike darn near avoided touching the ground, but my head hit real hard on solid asphalt. Put a nice big crack through that corner of my helmet. Replaced that thing at the first bike shop I passed!

In the end, I had a headache for a day or so but in my case I traced that to a neck muscle that didn't appreciate the whiplash. Not saying this is your case, and if you have ANY doubt I'd go see your doc, but I was right as rain in a couple days.

My most hated thing about crashes : the massive roadrash scab.