My fiance says I want his money.?

We are due to get married in 2 weeks and my fiance now tells me that I must sign a pre-nuptial. I am a bit wary about this as I feel that I will be left with no other financial if in the event we get divorced. I gave him my concerns and now he says that he needs to be wary of me as there is only one reason I'm marrying him ( for his money). I'm a teacher and he's a doctor. I feel very hurt and sad by this and now I have doubts about him.