I teach at a Bachelor level and I’ve had that happen to me while teaching before…thought I could make it to the end of class, and ended up just confusing the students pretty bad. I ended up having to stop class early, told them I’d clarify at the beginning of the next class, and went from there. My students all know I have diabetes so it wasn’t a big issue (and I’m sure they were happy to get out of class for the day 
but it’s still frustrating that I sometimes let diabetes ‘get the best of me’. It’s not an everyday occurrence though, so I try not to let it bother me too much.
I don’t think you should give up on your goal of attaining a PhD! It’s definitely do-able. And it is definitely annoying to hear all of the ‘suggestions’ about “common sense” items like taking glucose with you, controlling better, etc. We are not perfect, and we make mistakes (like correction factor mistakes). Don’t take those ‘suggestions’ to heart, and just keep on doing what you’re doing (you can do it!).
Congratulations to you for pursuing further your education, and good luck with your goal!
