Excessive medical treatment is harmful for your case and seems to me to be unethical. It is, however, up to you to communicate with your doctor, your P.A., your therapist and your chiropractor, and tell them you need no further care when you reach that point.
You are the consumer of medical care. You must be wise with the quality of medical care you receive and you must know when to stop that care by informing your care giver you are better.
Do remember, that while you and your lawyer have possibly made arrangements to obtain treatment on a “lien” you will be expected to pay for it out of the settlement of your claim. If you over-treat, the clinic will over-bill and at settlement you will be the one who is underpaid!