Help! My mediteranean spur thighed tortoise has not been eating for over a week!?

My Greek spur-thighed tortoise has not eaten properly for over a week! she is nearly 3 years old and she was fine when I had her for my Christmas present and she was eating for Britain but now she won't eat anything only a few bits of Komodo pellets. Should I take her to the vets? I have been really worried and I will be happy to answer any of your questions!