everything seems exausting

[volume]

I am 19 .I have been diagnosticated with depression and anxiety and prescribed lexpro 20 mg.I do not feel it is working and i think i know the cause.Here it goes.....I always have the feeling that i have an emotional issue unsolved,i am not sure what  is this emotinal issue(i know it sounds weird) or maybe i do not want to reconise it because it is too painfu l.Whenever i try to be positive,do something i used to like,act normal, i feel that there is no use doing it,it feels hard,exausting, because it is not the same it used to be because i have this unresolved issue,it really *****.You might say go to a therapist and sort your issues but i have analysed and overanalysed what the unresolved issue could be ,what it really bugging me and i don't know what it is,i have even been to therapy but nothing.Everything i do feels different because of this unresolved issue,feels boring,useless.I feel frustrated because i can not solve this problem,it affects all aspects of my life,i do not want to eat,i have big anxiety when talking to people and i always feel guilty and frustrated because i think it is my fault i feel this way because i do not solve this emotional issue and i prefer to avoid it.I am so stressed ,i tried to figure out what could this issue might be and because i felt guilty about masturbating i thought this might be the issue so i told my parents i masturbate to relieve myself but it didn't work,i still feel guilty and feel i didn't  solve my emotional issue .This is why i think i am depressed and suffer from anxiety .I wish i could forget about this obssession with the unresolved emotional issue but whenever i try to go on with my life everything seems too hard too exausting and i imediately feel guilty and think it is my fault everything seems so exausting because i didn't not solve this issue.It annoys me and frustrates me everyday.
This is the biggest problem of my life..do you think chemical imbalance in the brain could make me think this way?

[Roger Gould, M.D.]

I just answered this same question on the mentalhealth forum.

[Brioche]

This may sound completely ridiculous but hopefully you're open to any ideas..
I had lots of the things you are saying, I was depressed all the time and my emotions were all over the place, I had the eating disorder, the self harm, the drugs..everything.
At one point I was sent to the hospital because I took an overdose which was due to my depression. I had countless therapists who never helped. I really didn't care about anything and I was constantly searching for something to fill this hole that was inside me..
This went on for about 2-3 years, then my friend took me to this Christian festival thing, bare in mind I was a complete atheist and she still dragged me along..
This festival changed my life! Everything just seemed to be lifted, God just completely showed himself to me, I no longer struggle with food, I'm a really happy person and everything is so much more blissful now I have Him in my life. I no longer have crazy suicidal thoughts in my head and I no longer have odd issues with myself. I strongly suggest you go to an alpha course and find out more about Christianity. God changed my life and I really believe that He can change yours..
If you're really desperate to sought out this problem then give it a shot, it can't hurt you. If you don't know, an alpha course is a course for EVERYONE who wants to find out more about Jesus, you're free to ask any questions you like and it doesn't force religion on you at all..
I hope you take my advice because you're description of yourself sounds just like me before I found God.
Take care : )