Hi
@SpiritFree
The first thing you have to remember is you will make mistakes. Accept it and move on. The more you focus on making mistakes the more mistakes you will make.
That you have no confidence in yourself is the negative, undeserving self talk you might have heard all your life.
I know, I live it and I am afraid almost every day I will get fired and it has been ten years.
You will have to learn to accept you are going to be uncomfortable. Don't let that stop you. You will make it through but you have to focus on the work and not the people. Take each moment as it comes. Stay away from negative people. Don't discuss your life at work. No matter how nice they seem and even if they are nice people, you will still worry about things you share. This might sound harsh but work is not the place to make friends when you have PTSD. It can make you feel too vulnerable. I'm not saying don't be polite or friendly but avoid any kind of gossipy people. Avoid the friendly shit stirrers. They will say things like, I see you keep to yourself, that is smart, you are like me... They are hooks to pull you in, avoid them, it will make you lose sleep and miss days. Don't even listen to the complainers, make any excuse and walk away. I had to learn this the hard way and I'm still learning.
Don't think of yourself as being locked in an office. Think of the freedom you are working for.
If you have to, go to the ladies room with your phone and post here when you are feeling overwhelmed. I do that sometimes and it helps. You don't need to wait for a reply. Just the writing sometimes puts things in perspective.
I hope it works out for you.