I don't know if this is a "premonition" or not..but a year ago when I was at Santa Cruz with my brother and dad, I got horrible anxiety out of nowhere and I felt in my body that something was wrong and that something bad had happened or was going to happen. I can't describe the feeling I had but it was crazy. Then a few hours later, my mom called me and told me my grandpa had a heartattack. Is what I had a premonition? What are premonitions exactly? Can we stop our premonitions from happening? Like what if you get a bad feeling about something and you don't want that bad thing to happen in real life? How do you prevent it?