First, I completely empathize with your present state. It's perfectly understandable to question some things given your current state of exhaustion and stress.

Everyone is happier living a stress free life, but the thing is, there is no such thing.

The thing about being on the outside looking in at the struggles that you are describing is that I can see that they are self-limited - as far as the degree program is concerned.

You will graduate, and this stressor will be removed. I would try my hardest to stick it out and finish. How much time do you have left?

Of course, it's really really important that you do try to eat something, stay warm and drink water. Lack of sleep, caffeine and exercise are often casualties of intensive programs, however, when you make it and finish - it'll likely be worth it in the long term.

Completion will give you options, you may chose NOT to pursue this career you've trained for, BUT, you will have that choice.

Just keep a bottle of water with you okay?

When I was finishing graduate school it was a street fight to the very end. I felt like I was constantly fighting myself, the program, my family, my life. BUT, I made it. There is some time now between me and finishing.

It was worth every single tear. I rose to the challenge and conquered. Talk about a confidence builder....