I just realised that maybe the fact that I've had a headache almost every night since the beginning of December may be contributing to the fact that I can't get anything written in the evenings.
(My neighbours smoke indoors. No, nobody is enforcing the "no smoking" rule. No, complaining about it hasn't helped. No, I can't move. No, I haven't talked to them about it because I straight-up don't believe it will do anything because my neighbour told me they've been complained about for years.)