This is no time to be alone with your thoughts. Talk it through with a trusted person. Bottled-up feelings do nasty things to your insides. Find a hobby to occupy yourself, so that you forget the rest of the world for a while. Be of service to others less fortunate than yourself.
Laughter is the best medicine truly applies to stress.
Set new priorities if your time is consumed with activities that provide diminishing returns. Assess your real limits not what you want them to be. Unrealistic expectations of self and others fuel stress. Learn and practice meditative technique daily yoga, guided meditation, self-hypnosis. The cumulative effect is phenomenal.