when I've noticed this topic, I thought I could help you, but previous respondents gave the answers in the best way!
I believe to be confident and to be ready to explain your achievements are the most important things in that case. However, When I worked as a copywriter for my previous company, I've had the experience to ask for a salary raise in writing form via email, 'cause it was distance job. Now I don't have an "office job", because I work on my own as a freelance writer and that's a different story
but anyway, I wish you a good luck! it's really stressful situation, however, we don't have to shy!