Car accident pain and suffering settlement?

I got into a car accident and the other driver was at fault. I had back,neck, and shoulder pains. I went to go to a chiropractic to stop the pain. I went there for 6 weeks. The insurance paid for the medical bills to the chiropractor. Now I went to get a lawyer for the pain and suffering settlement. Why is it that... show more I got into a car accident and the other driver was at fault. I had back,neck, and shoulder pains. I went to go to a chiropractic to stop the pain. I went there for 6 weeks. The insurance paid for the medical bills to the chiropractor. Now I went to get a lawyer for the pain and suffering settlement. Why is it that I have to split it 1/3 with the lawyer and the chiropractor when the insurance had already paid the chiropractor. Shouldn't I just do a 1/3 split with the lawyer only and not the chiropractor?
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