What to do with these mood swings?

I've had mood swings since gr. 10. It seems to be getting worse and worse. Nowadays I go from feeling fantastic and full of energy to suicidal and then back again. I hate going to psychiatrists because I don't think they understand. They are humans too and imperfect. I've gone to counsellors/psychiatrist but I feel like all they want to do is put me on drugs or probe into my personal secrets that I don't want to tell. After they find out about my secrets, they don't even say anything meaningful. It bugs me like hell