What Causes Irritability And Weight Gain While On Clopixol Injection?

i have been taking clopixol depot since may 2012. i was totally fine till may 4 2016. my health had improved so much that doctor had even said that i do not need to see a psychiatrist ever again. doctor said- i was as normal as anybody else. Since october 2013, i was on dosage- clopixol depot 100mg once in five weeks.doctor had reduced the dosage due to side effects. and i was totally fine. suddenly on march 4 2016, when i took injection i became very cranky and irritable and once even cried on little hurt. after two weeks that is on march 19 , i felt withdrawal symtons and took injection. this time i became very restless and suicidal. but these symptons went away after four days of taking medicine this time again after two weeks on april 2, i felt withdrawal sympton. but this time i did not take injection as doctor said to take once in four weeks. please exlain to me what are the withdrawal sympton of clopixol. and when can i stop medicines. because i am gaining weight. my doctor had once said after some years i can stop medicines. so please tell me when can i stop medicines. i am on clopixol depot since may 2012. email- YYYY@YYYY