@shann - I used StrataXRT made especially for radiation burns. They do another one made especially for open wounds which can't be stitched - but stitches would help it work even better. It's easiest to buy direct from their website Stratapharma Australia. The one you would use is called Stratamed. I cannot recommend their products too highly. I used Stratamed on my mastectomy line as soon as they removed the dressing. I used their XRT product during radiation. I think it saved my skin which never blistered.
My heart goes out to you.
The medical profession stick together...