95 xj 4.0 L w/ 5spd manual transmission, completely stock.

I had been driving for a while (~ 1 hour, combination of highway/city); hit a bump, not a huge one but noticeable. I felt a jarring throughout the truck, and found that I could shift between 2nd and 3rd, but no other gears (1st, 4th, 5th, R, and the thing won't go into neutral).

Since I was in a very bad part of Hartford, I kept going on those two gears. When getting underway from a stop in second, the truck made very loud grinding/clicking noises until I was able to fully release the clutch, then it ran relatively well. Shifted up into third without much trouble, and ran well in that gear. I also noticed that the engine noise seemed louder, especially when getting underway (almost as if there was an exhaust issue, but upon inspecting from pipe to manifold, I saw no signs of damage).

Any ideas on the problem?