When it concerns matters of the heart it is serious business. Things may get at you psychologically, but that is only one dimension of yourself. When we get started on chemicals at work within you, worries on your mind, thinking about issues, feeling helpless because the people they target, the people they want to rid of look just like you - these all come into the dimension of our physical selves.
Life is in the blood, and blood is pumped by the heart so everything the blood is exposed to, all the molecules and chemicals, changes in your internal environment are all fed back through that blood into our hearts. Those hearts are connected to the body through the blood which is a transit system of its own, so know where I'm going with this.
Take the time to nurture yourself, ensure that no matter what you are going you do NOT allow it to reach your heart, as that is where the problems begin.
Handle the stresses and leave the rest out, the extra weight is not your package, it wasn't addressed to you or recorded as a delivery for your residence so leave it. Be upset when you want to be upset, walk away when you need to, change your environment if it keeps you at peace BUT do not sacrifice your health to satisfy somebody else's reaction.