what's wrong with me

i feel like losing my mind, each passing day became heavy, burdening, frustrating. every day feels like torture. these negative thoughts are eating me away, i can't bring myself to focus when someone's talking to me, i don't understand a single word they're saying, it's like i lost the ability to think. everyone is draining me mentally and physically, i feel very tired no matter how much i sleep. not to mention the nightmares that's always haunting me every night. i hate this, my life has turned the worst, and i don't know who to blame. i want to stop this feelings and thoughts.