No Reverse!?!?!?

I backed out of my driveway today and went to my dads. When i got there he wanted me to park on the street so i try to back outta the driveway, but i have no reverse!!! Any ideas? All other gears work fine, but reverse is almost like neutral, but it acts like theres a load on the engine. Any ideas? Thanks guys!

Clutch maybe? Your clutch might be going.

o ya, sorry guys. its an auto. but, i tried it about an hour after i got here and it works fine!!! damn, weird. any ideas?