I spoke to a nurse a few times briefly before my school could/would book me in with our psychiatrist.
Although I know it's dangerous, I'm also a psychology major and by that point had a very good idea of my diagnosis (was actually exactly right), and so she helped me talk through some ideas for alternative therapies; things like thought pattern changing, different foods you can eat, sleep pattern fixing, things like that.
All in all, you have to remember that with any psychological issue, you have to see a professional to ultimately get it fixed (at least IMO). Seeing a nurse for a condition like depression or bipolar is like seeing a nurse for a broken arm; they're going to tell you to see a doctor whether you can afford it or not, because they're not qualified to treat you they way you will need.
Also keep in mind they cannot prescribe you anything.