If you sense something in a dream and it really happens are you a physic?

Answer 1

Some psychics do experience predictive or prophetic dreams. But more often, one has a sudden, intense feeling that one has been in a situation before. When this feeling occurs, it is not unusual to decide that one has dreamed of the situation and the dream has come true. But this is a retrospective assumption; that is, one comes to that conclusion only after the experience has happened.

...... The only reliable way to tell if one has dreams that come true is to keep a dream journal. This is a simple notebook where one records dreams as soon as they happen, along with the date of the dream. Then when one feels that a dream has "come true," one has evidence of having dreamt the event before it occurred.

..... Otherwise, the odd feeling of having experienced something before is called "déjà vu." See the discussion page for this question for additional opinions, and the attached link for the Wikipedia page on déjà vu.