I'm overwhelmed - how do people get through this?

i don';t know what to do. I;m a mess. I;ve been through depression and a few bereavements. not tthrough them. i'm meant to be just starting my life but already it's a huge mess. i don't know how to sort it out. i'm in debt, can;t get a job. even my fish is sick. really sick. i dont know what i can do. Everyone must already think im pathetic so i can't ask for help. Other people get through on their own so why can't i? I don't know what to do. Feels like my life is over already.