Irritable from grief

I have lost a lot of people the last few years including a difficult death for my father that I was there for every day. My mom was diagnosed with late stage liver cancer on Friday and I am a total wreck.

Today at work I just wanted to tell everyone to go fuck themselves. They are all whiny and useless.

I am told to rely on them, but they are all unreliable so fine, I'll do it myself but then they get in my way and throw childish tantrums about things that are their own fault. I wanted to scream, "either be useful or get the fuck out of my way."

I am always the calm happy person that everyone talks to or asks for advice from, but all I can think about is my mom and death and I want them all to stop being useless and whiny. I have untreated CPTSD and death anxiety (panic disorder) and a complex relationship with my mom so this is difficult for me.

That's all. Nothing deep or meaningful, just I feel completely annoyed because of the grief I am feeling and I have no patience.

Edit: typos