“疑心太重”用英语怎么说啊？

Doubting Thomas 这是个典故，相当于成语了。T这个人是JUSUS的门人，J死了后他总不放心，检查了好几次，见于圣经里面的故事，后来就用它指怀疑主义者，疑心太重的人
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用词的话，可以用I am a doubtful ,sceptic/sceptical/skeptical,or doubting/unbelieving man.

very suspicious

You doubt too much.

or

You have too much suspicion.

Doubting Thomas这种说法我还没见过。。。一定不常用的。

paranoid
you are paranoid

You are a doubting Thomas.