This has never happened before? WOW how scarey it must feel.

Family meals are often a memory jarrer, imo. Perhaps if you can recall what the topic was, you might have a better handle on the anxiety the situation produced. (Or maybe it was where your mind wandered, if it did.)

But that's if it's a psychological trigger.

How long has it been since you've had a complete physical? That is usually the first order of business when anything out of the ordinary happens physically.

Another thought: were you eating anything out of the ordinary? Sometimes allergies can pull some strange reactions.

Hope you've figured something out, and feel better tonight