Take a step back... you've passed the type rating so proven you've got what it takes. Don't let the plane get on top of you - forget the junk you don't need and get back to basics - aviate, navigate, communicate. 3 times tables for the profile in the descent and you'll never go wrong. Configure the plane early during line training to give yourself time. Most importantly...relax if you can...it'll show in your flying.
Good luck...we've all been there