I think it depends on how you are feeling. If you have the energy, it might be OK. My white and red blood counts were very low after radiation. And I had a bad burn on my chest from the radiation treatment. I hurt for a while while I was healing, and I was too run down to "feel like it".
Ask your doctor, if you are worried. Remember, you need time to heal after the treatment(s). Be kind to yourself. You have been through a LOT!
Here is a test to find out whether or not your mission on Earth is finished: If you're alive, it isn't.