Assalam o Alaikum

Kindly suggest me two new subjects for my third attempt I want to replace Psychology and Town Planning and Urban Management.
CE-2017 will be my third and last attempt.Please guide me regarding this.
My previous Optional subjects were ;

In CE-2015

Indopakistan
Psychology
Zoology

In CE-2016

Indopakistan
Psychology
Zoology
IR
TPUM

In addition to this, I have lost my confidence totally What to do??
I cant write now.. CSS is my dream My passion and I cannot do that I totally lost myself. Just facing failures all around....
Please Please tell me what should I do

JAZAK ALLAH