2006 Cadillac CTS POPPING SOUND, BURNING RUBBER SMELL, WON'

IWAS DRIVING ON THE HIGHWAY AT ABOUT 65 WHEN I HEARD A LOUD POP. ALMOST LIKE A BLOW OUT. I STOPPED GOT OUT NO TIRE PROBLEM. GOT BACK IN SMELLED BURNING RUBBER, VERY STRONG. AND THEN MY CAR WON'T GO HIGHER THAN 2000RPMS.

Thanks so much in advance