Just throwing it out there, and it certainly isnt a bad thing at all, but many highly sensitive people can experience precog. There really is no explanation. Imho, everyone has that gift, but just arent paying attention, or just are not in tune. Try not to be frightened, Sweetie. It sounds as if you had some sort of a premonition with someone you are in tune with
Personally, I dont talk about it with people in my everyday life and keep it to myself. Many people are uneasy about it.
Definitely speak with your T about it. Especislly if it is upsetting and scaring you.
It happened to be often when I was little and I would tell my dad (we were really close. He would never invalidate me or say anything to make me feel bad about it, but I could sense he was a little uncomfortable).
It used to happen to me all the time with bf's, and I just learned it was part of who I am...it is a sort of gift. And if you arent comfortable with it, there are ways to work with it so you are not so in tune. It is similar to turning off the radio. You just need the right guidance.
You are going to be ok. I promise.