I hit the brake on my car quick to avoid an accident. i hit it with the side of my heel or the side of my foot. pain in area. could bone be broken?

Possible: If you have pain in the area that you it it could be that you have fractured the bone. Signs of a break (fracture) are pain, swelling and difficulty walking on the foot. It would be best to see your doctor and get an xray.

Get an x ray: This type of injury causes a subtle fracture and or dislocation called Lisfranc's injury. It can be easily missed, so I would recommend a specialist evaluation. See a Podiatrist or an orthopedic foot specialist.

Yes: Yes, it sounds like a classic traumatic fracture or dislocation to your foot. However it could be a subtle injury so a clinical diagnosis must be accompanied with diagnostic imaging. If there is uncertainty with diagnosis, an advanced modality (like MRI) is warranted.