Does it hurt on the top or bottom of your arm? If it's the underside, then it indicates CT, top indicates tendinitis or something else. Have you done the "press your palms together with your wrists straight for a full minute" test? If your fingers go numb, then it's CT. Otherwise, you may just have a sprained wrist and maybe tendinitis. Put ice on it for a bit and see if it helps. Heat may also help if it's CT. Anti-inflammatories may help the pain and any swelling you may have.
If it gets bad enough, you may need physical therapy and other pain medication, even corticosteroids.
Don't let doctor's blow you off. Insist that they answer your questions. You are in charge because you are paying them. Remember that. See a specialist if you have to.