Depression is a nasty illness, and I'm sorry you are suffering so much.
I was pretty miserable at that age also (I'm 42 now). I have been through a lot of therapy and tried different meds and eventually improvement came. It was slow.... and I still struggle at times but not like I did. I guess the one thing I would ask is why you have changed therapists each time. I hope you will not give up, and that you are able to begin feeling better!
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dailyhealing
"Although the world is full of suffering, it is also full of the overcoming of it." - Helen Keller
Strange how people who suffer together have stronger connections than those who are most content. –Bob Dylan
“If you can't fly then run, if you can't run then walk, if you can't walk then crawl, but whatever you do you have to keep moving forward.” Dr. Martin Luther King Jr.