Heh-heh, I get that kind of pain, even recorded a couple of arrhythmia/chest pain events on a monitor and my new cardio said he "didn't think it was cardiac related." LOL Whatever.
Barry - you should have it checked out. People don't usually get pain when they walk up a hill. Maybe it's muscle or lung related but it would be nice to know what's happening.
The symptoms you are experiencing are strong indicators of some cardiac problem, such as a blockage or valve leakage, and is called angina. I would contact your doctor and report this condition in the near future.