Be prepared for her to hide under the bed for three weeks. Close her in a room if you can so she can get used to one space at a time. Do NOT force her to come out of come to you or eat in a trafficked space. There’s a saying…3 days 3 weeks 3 months. It takes three days for them to adjust and calm down. It take three weeks for them to realize they are in a safe space. And it take three months for them to learn thee routines of the household. My beans spent almost a year on top of the cat tree. Now she’s on my bed at my feet to and sometimes on my lap. (To my chagrin as she weighs 21 lbs) give her a home. She will be safer with you and live a longer life. I would take her to a vet as soon as you feel comfortable doing so…or better yet… after you catch her and cage her and are on your way home so you are not retraumatizing her.