Yes, I do and have since I was 8 years old. For me, I get a foreboding sense that something bad will happen and within a short time, something bad does happen. I feel people's energy somehow, knowing if I will get along with them or they are people I should be wary of. I feel it when someone is hiding their negative vibe/can tell when people are pretending to be someone they are not. And as you mentioned, sensing negative energy in rooms telling me to stay on alert. I have learned from the past that ignoring these feelings have made me end up in difficult situations.
It's something I keep to myself because some minds are closed to the concept that a different kind of sensory perception exists and they immediately judge those who say they have it as being mad or delusional. So I just call it intuition, instinct or gut feeling, which are better understood and accepted.
