There is only 6000 miles on this vehicle and when I accelerate to around 20 mph it won't go any faster. When I try to give it more gas it won't do anything. Any suggestions on what this is??

 

Chances are very good your vehicle has "Electronic Throttle Control". You might try to tap the throttle body to see if that will correct the problem, but a visit to the dealer is the best move since it is a safety concern and covered by warranty.
Would appreciate it if you updated us on the problem and the solution, thanks.
If it has to be towed, that cost should be covered also!