No apnea, grief, anx, drugs, stim, stress, naps, tv. sleep pattern chg sud. 4yrs ago. 1 wk/mo severe insomnia, never tired. has 2 b physical cause. help?

Great question.: Unclear what the cause is? Is it the same week each month is anything special happening at that time-like are you worried about getting a paycheck? I sounds like you had a full medical checkup so there are no physical causes. Have you tried meditation or melatonin? So sorry to hear of your problem and hope you get better soon.

Possibilities: You may have restless leg syndrome, a circadian rhythm disorder, or just be a "short sleeper" (habitual duration of sleep <5 hours with normal sleep continuity and quality. Do you have daytime drowsiness? You may not need 8 hours! it may not be a disease at all. It may be normal for you.

Psychiatrist: A psychiatrist can rule out certain conditions that would provoke cycles of approximately one week of insomnia, along with other features (bipolarity); after labs and work up to find medical causes.