Hi Gina,
As per my previous post around splitting the chemo over 7 doses rather than 3 as it seems as though the side effects you are experiencing are due to the Cisplatin.
See if your MO is also happy to move you across to Carboplatin as the continuous ringing in the ear is no good.
As for the swelling, it will continue to swell around your chin / neck line as the radiotherapy will cause scar tissue to form within the skin. Make sure you plan ahead and talk to your doctors about sorting out physiotherapy post-tx so they can help with scar management & any issues associated with swelling due to lymphedema.
As for your treatment plans, I am sure they will continue with the Radio but may recommend you skip Chemo but this will ultimately be determined by your white & red blood cell counts.
Hope that helps and best of luck with your ongoing treatment!