Can only use 4th gear

Started my truck up earlier and when I tried to drive off I found that I could not shift it any gears except 4th.

When the engine is off I could slip it into any gear without holding the clutch down, with no resistance, which is abnormal.
With the engine on, clutch down, if I try to jam it into the other gears the rpms drop while trying to force it in.

Managed to get it home in 4th, burnt the shit out of my clutch. Tested a couple things on the highway, driving at 2500 rpm if I push the clutch down the rpms don't drop down to idle speed, they stay where they would be without my clutch down. But clutch down, still in 4th, if I hit the throttle the rpms jump up and my speed doesn't.

Wondering what exactly the issue is, soonest date I could find a mechanic is the 19th so I'd rather resolve this sooner as I don't have another vehicle.

2009 2.7L 5 speed

 

Sounds like your clutch is not releasing all the way, you need to determine if it's a problem with the clutch hydraulics or a mechanical problem with the clutch itself.

 

Check clutch master cylinder fluid level. Check slave cylinder. Not sure if the 4 poppers have a clutch fork?