Apathy , poor judgement , andmemory loss

I was on a medication named ..Gabapin nt 400mg or pregabalin for neuropathic pain from 1 years ..I was also got addicted to this medications ..but now I stopped taking it from 6 months ...but from 2 months I realised that ..I'm suffering from emotional imbalance, Apathy 24hrs ( Sadness ) , headpain , memory loss , and also I m very scared to go in social place ( social phobia ) ...it's very difficult for me  to talk with anyone in social place ...alltime I feel sad I don't know why I m feeling sad ..because there is no stressor in my life...but from the 2 months this symptoms badly effected my daily life...and I'm going this through ..before this medication  this symptoms existed but only 10 to 20  %..but after this medications  this symptoms reach 110% on me... I'm not able to concentrate in office or my personal life ...please tell how to overcome this issue if it's a medication effect on my brain ...