Memory weak, confusion, concentration.

From my childhood I had anxiety, panic and dizziness problem so almost 2years ago went to a neurologist and he gave me betacap tr 40 and amixide h and some blood test and MRI of Brian, After that my blood test report ware  absolutely normal but doctor found some very small spot in left besal gangliya in MRI so he suggested me to take clopitab 75 for 3 month, in that time I just totally depressed, and always thought that I had something wrong in brain it will become more problematic day by day and lots of negative thoughts, my ear, head ware buzzing and zapping some time, so doctor gave me zaptra 12.5 and hold amixide h. After few month my depression level ware down and I feel good, clopitab stop after 3month. But now main problem is my memory became weak, lack of concentration, confusion, I forget so many things which I remember before taking zaptra so doctors please help    Betacap40- 20month cont. Zaptra12.5- 18month cont. Clopitab- 3month stop Amixide h -2month stop