Firstly, be encouraged by the fact that Catmatix came back to your home. She obviously knows it is her safe place.
As previously noted, ensure she has access to high places.
If you are not familiar with Bengal cats, their facial expression can sometimes make them look scared. She may not be as frightened of you as you think.
A lot of people, when they first see my cat, think that he is absolutely petrified, but he looks like that most of the time.
He really isn't.
Give her time. As also previously stated, a lot of Bengal cats do not like to be petted, picked up, or held. Be patient. Let her come to you on her own time, and on her terms.
Do you have other pets or children? These can affect her behaviour as well.
Lastly, do not assume that she will not want to return to the outdoors. Quasar usually takes stock after an unpleasant situation only to return later and try another approach. She may well still want to venture outside. Don't let her.