“筋疲力尽”用英语怎么说？

A:My son has really taken it out of me. He never keeps out of mischief.

A:儿子累得我筋疲力尽，他总是胡闹。

B:After all, he is a baby.

B：毕竟他还是个小孩儿。

A:Yeah. Anyway he's driving me mad.

A:是啊，不管怎么说，我都快疯了。