Ouchie! Glad you seem to be on the road to recovery already. You were lucky not to end up with any broken bones! I went down hard on my right side a couple of years ago (dog accident), and ended up breaking my pelvis in three places and required surgery and a big ole plate and 4 pins to put it all back together. You were very lucky!
As others have said, if you hit your head, do invest in a new helmet. They are designed for one crash only.
Emily, who has been through three helmets in the past three years!
Emily
2011 Jamis Dakar XC "Toto" - Selle Italia Ldy Gel Flow
2007 Trek Pilot 5.0 WSD "Gloria" - Selle Italia Diva Gel Flow
2004 Bike Friday Petite Pocket Crusoe - Selle Italia Diva Gel Flow