Default [Q] Sprint Samsung Galaxy s3 stuck in odin mode.

My phone is stuck in Odin Mode and I can't get into recovery. When I open up Odin Mode it just says "Downloading.. Do not turn off target!!" In the upper left corner my CURRENT BINARY: CUSTOM and my SYSTEM STATUS: CUSTOM. When I go into Team Win Recovery Project and try to install a zipped ROM it says "Error flashing Zip" Updating partition details... It also says I have no OS. Can anyone help.