i have a problem with either my clutch or trans. 95 gsr

i was driving saturday, and i went over train tracks and right after i passed the train tracks, my car got stuck in 4th gear, and after alittle moving around i got it to go from 3rd to 5th, so i drove it home in 3rd, so i looked at the master clutch cylinder and it was leaking so i got a new one, and now it still wont go into 1st or 2nd gear, anyone ever had a problem like that, and wat wsa it, and my car has 114k miles on it and a stock clutch, but i didnt have too much problems wit it. Im wondering if its the clutch, or the trans, or syncro.
i need some assistance, so if anyone knows anything about this problem let me know.

thanx alot