Big Noise & sick feeling throughout whole house.

We were sitting downstairs, my cousin and I. She was in the livingroom watching tv and  Iwas sitting in the playroom playing on the computer. We heard one hell of a noise from somewhere within the house and right after that we got a scared & sickening feeling. This feeling was throughout the whole house because every room we went to, to see what it was we got it. We have never, to my knowledge had that type of feeling throughout the whole house. Still baffled.