Not cool

I think I have this:
Cluster Headaches: The term "cluster headache" refers to a type of headache that recurs over a period of time. People who have cluster headaches experience an episode one to three times per day during a period of time (the cluster period), which may last from two weeks to three months. The headaches may disappear completely (go into "remission") for months or years, only to recur. A cluster headache typically awakens a person from sleep one to two hours after going to bed. These nocturnal attacks can be more severe than the daytime attacks. Attacks appear to be linked to the circadian rhythm (or "biological" clock). Most people with cluster headaches will develop cluster periods at the same time each year -- either in the spring or fall or the winter or summer.

Cluster headaches are one of the most severe types of headache. It can be many times more intense than a migraine attack.

And this:

Hypothyroidism: Hypothyroidism can cause many different symptoms, such as:

• Feeling tired, weak, or depressed.
• Dry skin and brittle nails.
• Not being able to stand the cold.
• Constipation.
• Memory problems or having trouble thinking clearly.
• Heavy or irregular menstrual periods.

Symptoms occur slowly over time. At first you might not notice them, or you might mistake them for normal aging. See your doctor if you have symptoms like these that get worse or won't go away.

*Courtesy of WebMD.  I need to go to the doctor.