OCTOBER 9, 2017 I WAS REAR-ENDED, HIT AT 35 MPH. THIS HIT I WAS SITTING. I WAS SIDE SWIPED AT 40- 45 MPH, MOVING AT THIS TIME. I WAS AGAIN REAR-ENDED AT 50- 55 MPH, STOPPED. AND THEN I WAS BACKED INTO, IN THE FRONT END OF MY CAR AT 20-25 MPH. HOW COME NO AIRBAGS GO OFF?