Survivor’s guilt and PTSD after a house fire. Lost my only companion (my cat) and feel like I’m dying inside while being called "lazy" by others.

Hi everyone. I’m a 25-year-old male from Russia. I’m writing this because I can’t bring myself to speak out loud, and the support services here have been less than helpful (mostly 'call back during business hours'). A year ago, my life began to spiral. My ex-fiancée left me for my former best friend, leaving me with nearly a million-ruble debt. The only thing that kept me sane was my cat. She was my soulmate, and I loved her more than anything in this world. After struggling with depression for six months, I decided to move to a new city for a fresh start. But everything went wrong. People I thought were friends turned their backs on me, including a girl I had finally started to like. I hated my job, stopped going, and out of desperation, took out micro-loans. Then, the nightmare happened. A week ago, my rented house caught fire (likely due to faulty wiring). When I woke up, the first floor was filled with thick black smoke. The only exit was blocked by fallen beams, and the windows were sealed shut from the outside with heavy metal shutters. My cat bolted in terror. I spent 10 minutes in that smoke with a towel over my face, searching for her while everything around me burned. I could hear her crying for me to find her. Eventually, the smoke became too much. In a moment of pure survival instinct, I grabbed my jacket with my passport and managed to kick through a weak shutter on the second floor and jump. I stood there half-naked in the freezing cold, watching it burn while waiting for firefighters. I lost everything, but most importantly, I lost her. The guilt of not being able to save the one I loved most because of my own fear is crushing me. It’s been a week. I’ve always struggled to express emotions, and now I feel like a stone. People around me think I’ve 'accepted' it or that I’m just being 'lazy' because I can’t get out of bed. They don’t understand my body language or my silence. Inside, I am dying. I have clear signs of PTSD now. I’m terrified of working appliances (like a washing machine) or even a lit candle. I can’t sleep unless everything is unplugged or if I’m home alone. I don’t know what to do or how to feel anymore. I feel like I’m losing my mind. Has anyone else dealt with this kind of isolation and guilt after a fire? How do you keep going when your 'safety net' thinks you're just being lazy? P.s. I have a short video of the house burning; I’ll post it if anyone replies and wants to see it