Medical conditions after injection.

After my diagnosis as Bipolar manic (which I think I do not have) and have got OLANZAPINE 300 long acting injections ,my physical and mental condition is declining day by day. After few weeks, I developed bad memory ,I can't think ,my failing to express myself and had started to have difficulties in my study. Soon I reduced in my consciousness, cognitive function is impaired. Brain function is seriously affected as I can't carry on my studies or even failing to do my daily activities on my own. And physically I began having severe weakness, tremors, heart related problems like palpitations, throbbing heartbeats. More health issues like back pain, eyesight problem In 5 months span after injection, I am reduced from a cheerful BSC athletic built to an untidy stout guy with frequent memory loss, whose brain is fogged not even close to a schooling lad of standard vi. TBH, my academic career is in trouble. Is there any possibility of my recovery physically and necessarily mental recovery