I just finished radiation nearly 3 weeks ago and I still can’t really taste anything, but the texture of some foods makes it easier to eat. One thing that helped me a lot was the magic mouthwash that they gave me a script for, you can swallow it too and it really helps the throat. I would really encourage you to eat, even when you don’t want to and during the protein shakes, you need it and as many calories as you can get. Keep pushing and eventually it will get better.