Dear Friend,
Why thinking negative. why why why ???
As you said you have already cleared one group of Final, that means you are on the edge to be CA. Just one attempt, One group then you will be a 'Chartered Accountant.'
Just think what will be your life, your status in the society after becoming CA., that imagination itself will inspire you to achieve it at the earliest possible.
We humans always imagine everything what we should not and do not imagine something what is going to make our life beautiful.
I will suggest you to keep reading some material or watching some inspiring videos which will help you to start thinking positive and making you believe in your self and your efforts.
Just yesterday I watched vidoe of Shree Sadhguru on the day of holi on 01.03.2018, he has given a very nice message, I request you to please watch it, I hope it will help you.
link :
https://video.search.yahoo.com/search/video?fr=yset_widemail_chr_win&p=sadhguru+speech+on+holi+01.03.2018#id=2&vid=b321ca4f24e726ac4c808b9636e2520c&action=click