It might be unhealthy, but I let it steam. Letting it boil or pool around is too much. Sinking into a hole is not something that one should try to do, especially when things in life are always going to come by and take over for an event. You shouldn't let it blister either. Talk it through with a family member or friend. Maybe make some space and breathe for a little without trying to think about what it is that you are worried about. You can sort of just get over the details if you use replacement activities to deal with the times that it overwhelms you, such as yoga, reading, doing a puzzle, or walking.