I have a 1996 manual Nissan Pickup truck

I have a 1996 manual nissan pickup truck. Everything is pretty standard. No 4x4, no anything, standard. My problem started this morning. It was working fine the first 5 minute driving to school then I went on a turn and it started jerking in 3rd gear. As if shifted up into 4th and 5th, it went away. As I came to a stop sign, it did it in 1st, 2nd, and 3rd, then 4th and 5th was fine. Then I was slowing down because someone was turning, it cut off in 1st. Started it up, it did it in 1st, 2nd, and 3rd. So I turned around to go get my dads truck then it did it in every gear so its on the side of the road. I got my dads truck, went to go to school, came back to the truck and it wouldnt even start. Also there were no funny smells to my knowledge. I think its the clutch, but im no a mechanic. Also the meter for milage is broken (since I had it) and there is no RPM meter. Past owners said it was great, there was never a problem. I have had it for about two year, no problem untill now. What do you guys think? I thank you so much