Can't think, or absorb information.

I have severe difficulty in thinking and absorbing information in lectures when teacher is teaching, during conversations with people and while watching movies. It is very difficult to think or process that information which is incoming. And i also have severe confusion about where i kept my car keys, where is wallet where is my phone when i am driving a car . So its takes lot of time to think, where i kept those items in the car when i entered. I also cannot retain information in mind like there is overload of information. So i have to write down the information otherwise i cannot hold it to memory. I also have inability in reading comprehension. So, i cannot absorb stuff from reading and just staring at words. I also feel brain fog. I have this problem from last 12 years and none of the antidepressants have helped me. Please help me come out of this problem and suggest some appropriate medicines.