Premiere Pro starts rendering but then stops

Hello, 

I have no idea why it happens or even know how to fix it. I have looked up so many videos and looked at other posts all to no avail. When using Premiere, I would finish editing a video I made and then I go into export settings and choose a custom made export file for the software to use. I use CUDA and I have maximum bit depth on but not quality. I also have memory set to memory and not performance, and yet when the rendering starts, it goes on for a couple of seconds and I also noticed that the time for rendering goes up instead of down. Once it goes up a little bit, the blue bar starts but never continues and when I click cancel after four minutes of waiting, Premiere crashes and I don't know how to fix or even prevent this. Any help would be greatly appreciated!