I'm sorry you're having a tough time OP. I think PPs are right that you need to treat yourself like you've just been discharged from hospital to recover at home.
When I was signed off work with anxiety a few years ago, I did nothing for the first three days. Literally nothing, I barely got out of bed. Then I realised that wasn't making me feel better so I very gently added more things in. I would get out of bed and lie on the sofa and watch TV, then I added in having a nice shower etc. Real baby steps and taking things extremely easy.
Over time, things that I spent time doing and helped were:
Having long baths with nice products. Or really hot showers where I felt I was washing everything away.
Laying on my bed for an hour every day listening to a guided meditation.
Going on a walk while listening to a podcast. I would do that daily in the end and still do it regularly now so it's a habit I've kept up. I would get up, make myself get dressed and head right out the door. Then if all I did for the rest of the day was stare at the wall I still felt like I'd achieved something.
Eat healthy, nourishing food and also make sure to have some comfort food of whatever you like. I couldn't face cooking to start with so I'd have yoghurt and fruit for breakfast then get those pre packaged salads for lunch every day or a carton of soup and have that. Then I'd make myself whatever I wanted for dinner. Whether that was egg and chips or a ready meal or assembling myself a ploughmans I just focused on making sure I was eating three meals a day. Slowly I started spending more time cooking and preparing myself nice meals but in the early days convenience food was a lifesaver.
Taking my book to a café, ordering a hot drink and reading for a while. I often combined that with my walk so walking there and back and it helped to feel like I was around people but no pressure to socialise. Again, reading is a habit I've kept up and I now read every day.
Speaking to a counsellor through my work's Employee Assistance Programme did help me and there were resources on there I worked through but in the early days you're still in fight or flight mode so it will take time.