If you want to combat stress, learn a bit about astronomy. If you are too lazy for that, download Google Earth. Zoom in on your neighborhood, and soom out slowly.
Realize that you are one of 7 billion of the most incomprehensibly miniscule specs imaginable compared to the earth, and the earth is incomprehensibly tiny in comparison to our solar system, and "our" solar system is incomprehensibly tiny compared to "our" wing of "our" galaxy, which is one of billions. BILLIONS. Chances are not even a single percent of a single percent of a single percent of the world's specs know, or ever will know, anything about you.
Life is fleeting, and, in engineering parlance, negligible. Which is not to say that you should lie about painting your fingernails black and listening to Kurt Cobain, but rather that worrying about the past or future is comically useless, as you can't do anything about either and neither really matters. It's a cliche, but
live in "the moment".