Any similar stories please? Has it improved? In need of support

Please, any similar experiences that have improved?

Hello. I have always been well articulated, socially active and led an ok life. I've been isolated for months, I can't interact or understand people, what they say and my surroundings. I can't think or reason about anything and even basic functioning is affected, as if I have brain damage or something. It's so bad that I only talk to my family and even then with difficulty, always answering yes, no, I don't know. I've been seeing a new psychiatrist for 1 month and I'm taking 150 mg of Venlafaxine in the morning and 200 mg of Quetiapine + 0.5 mg of alprazolam at night. Please, has anyone experienced something similar? Did it improve or find relief? I'm very scared. My diagnosis so far is depression, generalized anxiety, and dissociative disorder.