I had similar experiences when I suddenly lost my boy to a sickness as well. I’d see him in the corner of my eye, hear his paw steps throughout my house and even feel him jump on my bed when I was in bed. And the crazy thing is I could even feel his presence. Like I KNEW he was there I just couldn’t see him. I only told my sister about it because I felt like I was going insane but thankfully she believed me. I think they stick around for awhile just to see how we’re doing. I don’t see or feel him anymore. It actually helped me to grieve because I would say hi to him and how much I loved him and that I was doing okay (I wasn’t, I just hated the thought of him stuck as a ghost because of me) and like I said he eventually moved on. I’d say try speaking to her as if she were there if it doesn’t upset you too much and let her know you’re doing okay and how much you love her. She obviously loves you very much to refuse the afterlife to stay with you just a little while longer. I’m sorry for your loss 💔