What Causes Memory Issues, Distorted Thoughts, Weakened Speech, Emotional Numbness, And Constant Mental Stress Over The Past Few Years?

something is happening to my mind. 3 years ago, my mind suddenly activated picture memory. Half year into it, i suddenly feel my mind shutting down. I feel like its been degrading ever since. There was a 2 month period during which it jogged up again and it was like i was getting picture memory back. But after that, it again started to go down. I am struggling with things. It is like the more an image forms in my mind, the more it gets distorted. My speech pattern is getting weaker. Sometimes, i feel lack of emotions in me. Moreover, i have been thinking a lot lately, like for a year, my mind has been under constant stress..thinking about behavior of people towards me. I cant make my mind think. It just sorta activates on its own, suddenly goes down as well. sometime i feel constant pain in my temporal region