Why my hazard warning flasher doesn't work?

My car is 93 Eagle Vision TSI. I will have a G road test the day after tomorrow, so I have to take some pratice. When I practiced " Emerengy Parking ", I turned on the hazard warning flasher, but I forgot to turn off. After 10 minutes, I found that the left/right flasher didn't work, I realized that I forgot to turn off hazard warning flasher, so I turn it off immediately. Then, the left/right flasher works again. But, the hazard warning flasher doesn't work anymore even if I try many times or many ways.
So can anybody tell me what's wrong with it? Do I need to change hazard warning switch? Thanks a lot

check your fuse, make sure nothing blew. If you have a bad flasher, it's actually a relay that underneath the dash by the steering column that you'll need to replace.