You do not have to solve tomorrow before making this evening more manageable.

The mind treats the unsolved future as a reason to leave the present unattended. If the big thing is not settled, then a decent dinner, an early night, a tidy room can feel like distractions or denial. But the future is not solvable at nine in the evening, and arriving at it exhausted rarely improves your options. Making the next few hours bearable is not avoidance; it is maintenance of the person who will handle tomorrow.

Pick one small thing that would make tonight easier and do only that. Leave the large question where it is until a working hour. Rest is allowed to happen before the problem is finished.