Welcome to the forums and thank you for joining us and sharing what's been happening. I hope that by being here you can find some support in these forums and feel welcomed.
While reading your post it sounds like you've had to make a really big decision around your career based on your mother and since then haven't really been as satisfied in your new job. Have I got that right?
Personally, and frankly - while I'm glad that you reached out to a counsellor and got some support, all the medications and anxiety techniques in the world can't help if you are at a job that you don't enjoy.
You said that you want to quit and face something else but are afraid of searching and not finding anything - what were to happen if you were to just explore the idea of something else without the idea of commitment? By that I mean just allowing yourself to brainstorm and think of ideas without limitations - no matter how likely/unlikely it is that you'll end up going that way. I think that if you were to give yourself permission to think outside the square (and pop that fear aside), you might find some more potential. Even if you were to start with crazy careers such as an actor or astronaut, just to allow yourself that time.
While I know this suggestion is a bit out there, I'm guessing that you're probably limiting the ideas that you've come up with purely out of fear (even if you don't recognise it).
I hope that this makes sense to you!