I'm working for a company in southern England having joined from university in the summer. I have worked above the level I was brought in at, developing projects, visiting clients, delivering solutions when I was brought in as support to then progress into this over a year. 6 months in I'm due my review. I was never expected to travel much for work but I do, and I work hard, I'm new I want to impress. Is it too early to ask for a pay increase? Considering the main thing here is, I'm doing a job above what I was brought in to do?