My silkie went broody for about the same amount of time. It was very hard to get her to eat or drink, even by hand and she's still a bit weak from the whole thing. No eggs yet from her but she is getting a little bit stronger every day. That was rough.
I had a post over in the sickness board about her acting funny, wobbly, takes a few steps and then sits down. I am not sure if it was the same timing from the last time she was broody, but I will know for next time. She is acting fine now.
I would take her out of the nest box and set her in the run, she would immediately start to eat and drink then go back in.