Hi Plantlife,
I've not read any of your other threads and have no personal experience of DV, but it seems to me that the fears and doubts you're having right now are a typical stage of the healing process. Many of the threads I've read about similar situations mention the crushing self-doubt and 'regret' of leaving, but it's because he has so utterly broken your spirit.
I second what recent posters have said about seeing a gp about medication to get you through this difficult time and psychological/psychiatrict support to help rebuild yout confidence and sense of self for the long term.
I imagine that if you are in one of the vulnerable groups your anxiety must be through the roof about covid, but even so the statistical chance of getting it is very low. The media tell the horror stories but many, many more people catch it and get over it than those who die. I'm not minimizing it at all but I think it might help to put things in perspective.
Would you be able to commit to writing one achievement per day on here, so that you can track your progress? You can always post your fears too, but forcing yourself to fix one objective per day and directing your thoughts to that might help create new positive habits.
Jusr know that whevener you feel weak there will alxays be one of us here to listen and give you a virtual hug, and to hold your hand through this.You really are stronger than you think. Leaving is proof of that. You will get stronger with time.Think back to the ten year-old you were, and make the choices and decisions to give her the best life possible, starting from today.
So, concrete task: come here every day and tell us one thing you are proud of and/ or grateful for. It could as simple as "I managed to calm down when I started panicking" or "I made a gp appointment". It cound even be "I'm here trying to focus on the positive." Like exercise, turning up is the hardest part. One day you'll be telling us you've just bought nice bed linen for your own place. Close your eyes and really try to visualize that. You really, really can do this.
And honestly, don't worry about the bad days/wobbles. They're bound to happen. When they do, say to yourself " I'm having a bad day. Change is hard. It's all part of the process. I'm going to notice and name these fears and emotions, but then I'm going to post my positive achievement in mumsnet."
Sending you sisterly love