Second what Trek said: get a new helmet no matter how nice your current crashed one looks. Some companies will take your crashed helmet and give you a replacement free. Check into that, but don't wear this one again.
I just switched from big juicy hybrid tires to sleek sexy touring tires. Whoa, Nelly, I'm having to relearn some bike handling! Met up with some RR tracks yesterday (after nearly doing what you did on the edge of a path) and decided to walk the bike across.
I tried to kinda hop my front tire up onto the edge of the path, and that went fine. Then tried to float my back tire up onto the path. Hah! The back wheel got knocked out from under me and I had to do some bouncy thing to keep everyone lined up. The next time it happened I stayed on the gravel until the path was at the same level and I could just ride over. I gotta get a feel for these tires before i do that again.
"If Americans want to live the American Dream, they should go to Denmark." - Richard Wilkinson