1993 Acura Integra

Transmission problem
1993 Acura Integra 4 cyl Front Wheel Drive Manual 174K miles

To my knowledge the clutch on my car has never been replaced. I was driving my car into work, and pulled up to a red light. When the light turned green and I tried to put my car back into gear, I could not place it into gear. I pumped the clutch a few times, without any success. Eventually I was able to jam the stick into 3rd gear. If I tried to get the car into any other gear I was unsuccessful. While trying to place the car into gear, the car did not grind, the transmission just would not move. While in 3rd gear, I was able to drive to my local repair place. Using the clutch to rev the engine so I could start from stop at traffic lights. Once I arrived at the mechanics, I turned the car off and then was able to shift into all the gears without a problem. I restarted the car, and drove to work without a problem. My car is now awaiting me in the parking garage and I am wondering what is wrong with it. Thanks.