FORWARD: You should always follow your doctor’s orders and the following advice is just that, advice, and not to be considered over any doctor recommendation.
Let me put it in short words, NO!
If you abruptly discontinue medical treatment because you think you are better, you could be wrong. The thing with soft-tissue injuries or whiplash is that they are very misleading. You feel okay one day and then all of the sudden your symptoms can come back. And they can come back worst than before with symptoms of migraines and/or circulation problems that you would never imagine.
Now, of course you can re-seek treatment; however if you want your insurance to pay, your chances have gone down because they will argue that your injuries related to the auto accident are healed and what you are seeking treatment for now is different and not related to the wreck.
It is my opinion that the best thing to do is gradually discontinue treatment so you can make sure you are restore. Yet, Uunfortunately after any type of injury this restoration will not be complete.