I am guilty of having email on my phone, but I have it on the last page of apps so the "unread" bubbles don't bother me. I usually forget to look at them until work anyway.
Something that has helped me put things in perspective (eighth year teaching) is realizing that I can't remember most of my kids' names from my first year. I have vague recollections, but I don't remember a single thing I said or that they said. In the end, you have to worry about yourself the most, because you are the most important person in this whole mix. All people will really remember of you is your demeanor! If you're unhappy, it does not matter how much you care or how many hours you put in. The kids won't work for you because they won't like you.
Put less pressure on yourself, play an easier program maybe. Don't have ten region sectionals a week, coach four ensembles, and teach four private lessons (guilty, definitely burned myself out that year). Even if you only do the bare minimum for a year or two, it may be enough to get you over the hump.
Best of luck!