I can't think of a way to explain that I know you're going to recognize
You've obviouslyfelt it before (being 35). Have you felt carsick? If so, that's your answer. If not, it's an uncomfortable feeling that is in your stomach (directly under the center of your ribcage which makes you feel alarmed. Some people report feeling it in their neck (children often confuse it with neck pain). Have you ever V*d?.