Do lots of people get chronic pain, or is it unusual?

It's common. I see many people with all types of pain, and many have had pain for a long time. The key is to find out what is causing it in order to choose the appropriate therapy.
More than you think. A recent study indicated that upwards of 100 million americans may suffer from chronic pain in varying degrees of severity costing $635 billion yearly in medications and lost productivity. You are not alone.