Oh my god, Una, I have no words. Your poor sister. I'm so sorry. That's one of the worst medical nightmares possible.
Nothing remotely psychic ever, ever happens to me. No strange coincidences, no prophetic dreams, no funny feelings, no nothing. I think you're either wired for it or not. I suppose, on some level, I don't want there to be such thing as precognition, ESP or anything "paranormal". I don't trust what I can't see for myself, and even then I don't always trust my own senses. I've been high enough times to know that my brain is perfectly capable of fabricating sensory perceptions that manifestly do not exist.
Interestingly, I used to love the X-files, and that show was all about the paranormal.
Mind you, pil, if you enjoy having the "spooky" feelings, then great! It's kind of exciting. When I was a little girl, I used to wish I would see a ghost or have a vision or anything, really, that was potentially not real. Sadly it never happened. But it would be a boring world if we were all the same.