I'm wondering if working with a psychotherapist now would help you with dealing with the stress later. You had one unpleasant experience but it isn't a given that it would happen again as you learn more about how stress works for you, the person you are.

I think it would be wonderful if you were able to master that stressful time, which fortunately has an end. You would then be free to fully participate in all areas of the profession you chose and worked very hard to accomplish. I see this as one hurdle, and a very intimidating hurdle, that is frightening, but that could be explored and understood in psychotherapy so that it would become something much less intimidating. It could become a part of the work cycle that you dislike, but that you can get though and celebrate the relief of it being over.