I'm sorry! That was a stupid thing to say - I don't know what came over me.

抱歉，不該說那種蠢話。我不知道剛才是怎么了。

[come over sb] 使某人突然感覺到（某種強烈的感覺）

A wave of sleepiness came over me.

一陣睡意向我襲來。

[I don't know what came over me] 我不知道我當(dāng)時是怎么了

I don't know what came over me. I just felt the urge to cry.

我也不知道當(dāng)時是怎么了，就突然特別想哭。

（可以用來開玩笑）

He gave you a present! What's come over him?

他竟然給你買禮物了！他這是怎么了？