Is this all part of teen age?

i am 19 yrs old boy.isuffered from depression from very long 5 yrs or more.i went on anit-depresent for 3 yrs now suddenly stopped them .3 suicide attempts and self-harming was all part of me.my grades suffered badly and i just started failing in subjects.now i feel better and not trying this anymore and feel sorry for my suicide attempts.i remember that i had stomach wash one times and lot of tried overdoses and feels so bad abt it.sometimes looking at scars bcz of my self-harming i feel sorry.i feel so upset abt this all but i think i couldn't hav helped it.my psyctrist tells me its part of teen age.do u think these all things hav link with teen age.is my teen age over now or there is more bad time for me..