2015 SUBARU CROSSTREK Fuelpropulsion System Problems

I WAS DRIVING ON THE INTERSTATE GOING 75 MPH, PASSING ANOTHER VEHICLE, WHEN THE CAR RAPIDLY LOST SPEED AND REVVED TO 5500 RPM. THE VEHICLE CONTINUED TO LOSE SPEED AND WOULD NOT RESPOND WHEN I PRESSED DOWN ON THE ACCELERATOR. I HAD TO QUICKLY PULL TO THE LEFT SHOULDER. LUCKILY, THE CAR BEHIND ME WAS PAYING ATTENTION AND WAS ABLE TO SLOW DOWN AND NOT HIT US. I TURNED THE CAR OFF AND LUCKILY THE VEHICLE DID RESTART. MY FUEL LIGHT HAD JUST TURNED ON MINUTES BEFORE THIS BUT I STILL HAD 60 MILES TO GO BEFORE EMPTY. I WAS PLANNING ON EXITING TO REFUEL BEFORE THIS HAPPENED. I STILL DO NOT KNOW WHAT CAUSED THIS TO OCCUR. I LEFT A MESSAGE WITH THE DEALERSHIP AND I AM AWAITING A RETURN PHONE CALL TO HAVE THE VEHICLE ASSESSED.