I have Lupus SLE and Denied PIP

Hello. I suffer from Lupus Sle, depression and was on PIP for about 8 years until they stopped it a few days ago. Last year I received a letter telling me I will receive PIP till 2024. It had been a very hard year for me. At the start of the pandemic I was told to stop taking my Aziaphioprine because my white cells had gone too low, then I had to self isolate alone. I then started receiving letters stating I'm very high risk and if I catch Covid I will die. I was terrified, super depressed all alone. It had a major impact on my mental state. I couldn't see doctors, everyone was busy with Covid. I then started to lose my hair, then the one that I dreaded started again. Black dots on my skin which started to get larger. All over my face. Already have the butterfly rash. Then the joint pains and tiredness and memory loss. I tried to end my life by taking tablets, that didn't work. 

Beginning of this year I told DWP my condition had worsened. I had an assessment 2 months ago over the phone. The assessor asked me if I've tried to harm myself I told her yes and broke down. She said she was going to end the assessment and call my doctor. I told her I wanted to go through with it. Everytime I tried to give her examples she would cut me short and tell me we only have an hour, she would shout at me and tell me I'm going to lose my PIP and twist my words. I told her I have no sense of smell, I've nearly burnt down my flat twice so I use a slow cooker. She would then say if I use a pressure cooker then I can cook. So I'd have to correct her. She totally lied about things I said. She called my doctor who immediately doubled my anti depression tablets then a few days ago I received a letter stating my PIP has ended. That money used to help me get out and about pay bills and help with daily tasks, I called samaritans it helped a little. I'm confused, depressed in pain and need help.