Test pilots have a litmus test for evaluating problems. When something goes wrong, they ask, "Is this thing still flying?" If the answer is yes, then there's no immediate danger, no need to overreact.
Each of us needs to withdraw from the cares which will not withdraw from us. We need hours of aimless wandering or spates of time sitting on park benches, observing the mysterious world of ants and the canopy of treetops.