I think the opposite. I've had a similar relationship with depression/anxiety/counseling whatever and I think it will help with psychology. If you can understand why we get to the point of being depressed, schizophrenic, anorexic or whatever issue then surely it's easier to seek help or at least see why you're feeling how you are. My psychology teacher and I were discussing the other day how people who follow the psychology route usually have personal reasons for doing so. I guess it depends on what you intend to do after University as well, but if you love the subject then stick with it!