And I was stupid enough to have saved some private keys in the drafts along with some other passwords. And I ended up losing around $16k. At that time I didn't remember to reset the password of my BTT account and I am assuming that is how I was compromised.
So all this stuff was in your Bitcointalk PMs?
You should probably change all your passwords too since they were also gleaned by the hacker when they logged in your account.