Not able to remember things for long.

Hi Sir/mam I am 17 years old and I am facing a problem of forgetting things very often. I am not able to get the cause of the problem and how I can solve it. Even after trying so many things for it I did not get the results. All these things make me stressed and suicidal thoughts comes to my mind. These thoughts are increasing day by day. I had extraordinary remembering capacity before but now I have lost it. My friends who were far behind than me are also performing better than me. My family members also don't believe that I have this problem. Whenever I tell them to take me to a psychiatrist or show online, they just scold me. They don't understand me. I am alone. No one helps me. Please help me with whatever you can 🥺