Transmission Help

Hello, so basically i have a 2016 NISSAN 370Z SPORT, Manual 6-speed Transmission. So the other day my car slipped in 3rd gear and then after that, i started to hear a crackling noise and burning smell, It almost felt like something was shattered. I pulled over to the side of the road and my car wont move. It revs and goes into each gear without having to push in the clutch, it doesn't stall out even if it's in 6th gear. What's wrong.