First, I realize the wet darkroom should be well ventilated.

But I wanted to ask out of curiosity to those who have worked all day in an unventilated one developing B&W prints in open trays: Have you noticed an ill effect from sucking in fixer fumes on your (even if just temporary) state of mental health? Did it put you in a slight funk for a sort while - like adding a full moon to a hangover?

Over the years, when I've had rare occasion to develope prints for a whole day stretch, I kind of felt 'out of it' the next day.

Is this just my imagination?