Everyone gets stressed out, even the “experts.”
How do you think they became so adept in the first place? They needed what meditation had to offer so much that they made a concerted effort to practice it. Meditation teachers are not superhuman, unless by superhuman you mean “even more subject to the frailties and flaws of being human.” They’ve been in the same place we all have, and they’ve survived in no small part because of their meditation practice.
So take heart: if they can do it, so can you. You have the very same ingredients in your being that they do, all the elements necessary to pursue a beneficial meditation practice and lead a mindful and compassionate life. Buddhists might say that we all have the same essential Buddha-nature inside us and, therefore, the same potential to achieve enlightenment.
All of us suffer and all of us desire to be free of suffering. That’s all that is necessary to begin meditating and for meditation to bear fruit.
Along those lines, here’s an article from Pooma Bell of Huffington Post titled, “What Does The Founder Of Meditation App ‘Headspace’ Do When He Gets Stressed Out?”