On Thursday evening's ride back home I was doing around 15mph at an intersection when my right-side handlebar (right where the stem meets the bar) snapped. Of course I didn't know that at the time; all I knew was my left hand felt over-weighted and that I was gonna go down any second.

I was gonna go down on the road surface but managed to put in another couple of strong pedal strokes and prepared to hit the grass verge a few feet further up so I managed a controlled crash. No injuries except couple of bruises and scrapes.

After some dog ran over to where I was sitting and started licking me all over and the dog's owner attempting to get the dog off, I examined the bike and saw the bar had snapped just to the right of where the stem meets it. I hit no bumps or potholes and have traveled this route for 2 years so know the road surfaces. Handlebar is stock item on bike and has around 11000 miles on it. I'm 95kg (210 lbs). It's been serviced twice (full dis-assembly/re-assembly at LBS). Over the years I noticed softness in the front end, but I figured that was just me getting stronger.

Questions about bike:

It's an aluminum Specialized purchased September 2006 and there doesn't appear to be any frame damage. Should I still bother getting the frame checked out?
Obviously i need new handlebars (I dont know what make they are, just standard Allez item, I guess aluminum). But should I also buy a new stem?
Am I supposed to change handlebars every couple of years or something (I read that on an archived bf thread)?