USB and cigarette lighter stop working (intermittently)

Help. Sorry for my english. i got a 2012 LT. I was in 3 hours in a trip driving yesterday, i had my phone connected to the usb auxiliary playin music. Suddenly, started to disconnect and connect and disconnect until it stoped working. Minutes later, the other cigarette lighter in the front, also stoped working for charging. When I got home, I though was a fuse. Checked the fuse, everything looked ok. I start the car again, and everything was working. Today I was driving, and the same happened.

Any idea??

Thanks!!