You didn't make it this far only to drop out in the end. You got this! Presentations and oral exams in college were always a nightmare for me to the point I'd go hide in the restroom when I had one and I considered dropping out too and always thought I'd never graduate with the rest of my class but I pushed through and graduated from the school of architecture 2 years ago. You can do it! There are many great techniques and tips on here that you can try to help control/reduce your stutter. Believe in yourself.