How do I get over this fear?

The thing is I was not in this aim 720 batch but for some reason they have made me sit among these students and they are also making me write these pst exams...idk yaar in baccho ke beech mein baithkar lagta hai i don't know anything I feel so inferior among these students...jo bhi padha hua hai i feel ki mujhe voh bhi nhi aata...I know iss pst sab mein mera literally last rank aayega...i will feel so demotivated upar se yeh coaching wale and mere parents mujhse justification mangenge ki why I scored less...bahut depressing sa lagta hai coaching aana mujhe... koi tips de sakta how do I overcome this fear?