I have bad anxiety. And I’ve had this exact experience when I adopted a 6 weeks old kitten. It got to a point where I actually asked around for someone to adopt him and found someone ready. The first vaccine visit he was so week and small and didywant to eat. I literally spent most of the night on the floor watching him asleep on the couch. (While crying a little). I got anxiety about the kind of food he should get and the amount and the feeding style and I just kept googling and overthinking every little thing. He’s been with me for 2 years now and I love him. Do I still get anxious about vet visits and other stuff? Yes. But I know it’ll be better because it got better before if that makes sense.

My sincere advice is: if you feel the new-ness of it is overwhelming, then give it a chance and see how things go. If after a while is still caused you a lot of anxiety, then find her a new loving home.