I am experiencing irrational fear or phobia. The following also describe me: Poor concentration, Feeling anxious, Irritability, and Nervousness. What?

Not certain what. you are asking here. Have you considered cognitive behavioral therapy for this symptoms. I might not be addressing your question - so please consider resubmitting and clarifying the question.

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I am experiencing fatigue, nervousness, hopelessness, irrational fear or phobia, restless (tossing and turning) sleep, paranoid behavior, emotiona...

Evaluation. You need to be evaluated by a medical professional. This needs to be your regular doctor, an ER physician or a mental health worker. It needs to be done as soon as possible, like right now. As you are 16 tell your parents, or guardian and get them to take you now! Read more...
Therapy? Have you yet tried any form of psychotherapy? Typically, the optimal combination of things to treat emotional issues such as symptoms you describe is medication (which, on your best day, is supposed to take the edge off symptoms) but the real gruntwork takes place in psychotherapist's consulting room. Read more...