Difficulty in remembering things. At it.

Hi doctor, I am a student of class 12 preparing for IIT. From few months I have been facing a problem of forgetting things very easily. I can remember things for short-term but It's  very difficult for me to remember things for long term. I am facing a lot of problems because of this. That's why I have been searching for the answer to this problem but till date I have not found anything which could really help me out. Even, 3 months ago I consulted with a psychiatrist but his medicine was not suitable for me. There was shivering in my limbs after the consumption of the medicine. Even I have tried many exercises but nothing help me in the long run. I try different methods of remembering things like visualization or linking the information with some of the event, etc.But it's very difficult to do it  everytime.so,Please help me doctor I shall be really grateful to you if I could get out of this situation. I am sharing my report of consultation with psychiatrist,please have a look at it.