Talk to Psychiatry on Mental Disturbance

I need diagnosis for the issues I am facing right now. I have soe sort of short term memory disorder due to which i am unable to remember past event with the exception of those that involved greater level of attention. I can not speak up in confidence and I have skme learning issues aswell. I have been taking antidepressant meds in the past from three different doctors but of no avail. I am unable to properly focus in situations which is affecting my work and I have started being isolated. I just keep sitting quietly like dumbs even when I am with friends and they are all mocking around.

Any suggestions for a preferred treatment or a doctor which might look into all of these issues would be welcomed.