I keep getting what feels like hot flashes, but..........?

It could be a rush of adrenolin or it could be a harmone imbalance. It could be just about anything. If this keeps happening check with your Dr, Especially if you get hot and cold flashes, because it really could be a thyroid problem. That happened with me. And in that case you will need to see a Dr. and most likely be put on medication. Just keep and eye on it for now... But don't let it go for too long if it keeps happening.