insurance company will not pay

What will an insurance company to pay for whiplash?
I was struck by a tractor-trailer at low speed (10 mph). There were only about $ 900 damage to the bumper of my truck. I went to the emergency room and had X-rays and went to a chiropractor for 8 weeks whiplash. The chiropractor fee of $ 4000 for the treatment and bills from the emergency room came to $ 1900. Therefore, my medical expenses totaled $ 5900. Insurance other driver with 100% responsibility. $ 5900 is too much money to expect the other car insurance company to pay for the treatment of a whiplash injury? I'm in North Carolina.
Well, depends on the state we live in since I was a semi that probably will pay all medical bills without blinking an eye as the fact when you have a class to which they are responsible for most accidents, even when not your fault.
Insurance company will not believe this