1994 Toyota corolla (manual) suddenly got very hard to shift.?

I think it is your clutch and you might want to get it fixes. but i know from experience that you don't need to use the clutch to shift. as long as you let of the gas and slowly shift its fine. you really only need the clutch for first gear. but you should get your clutch fixed because shifting without a clutch i don't think is so good.