Bruising is a normal symptom of injuries. It occurs as blood pools under the skin. Medical professionals refer to bruising as contusions, which simply show where small blood vessels have been broken in the body.
You were rear-ended, and you thought that you probably suffered from whiplash. You took the ambulance to the hospital and had your suspicions confirmed. You thought that it wouldn't be very serious.
Car crashes can happen anywhere, but with the weather changes that take place in the fall, it's a particularly important time to talk about the risks of driving in dangerous weather. Right now, for example, there is a hurricane moving up the East Coast that could impact people in Georgia. Flooding is a real possibility, as is backed up traffic and evacuation stressors.
The other driver didn't see you, and the next thing you knew, you found yourself getting out of a wrecked vehicle. You felt fine, so you talked to the police and other driver before turning down medical help.