Thanks gdawson, I'll try taking a longer break.

I've been so sleepy lately. This is a new one. The insomnia I get means that I get sleepy early in the evening and wake up early in the morning. The rest of the day I'm usually OK. Oddly, this is pure sleepiness without fatigue, and it's fatigue that always plagued me in the past. I could easily sleep all day and still feel sleepy when I woke up.

Ah, the many facets of mercury poisoning, LOL.