I am 10 weeks pregnant?

Many possibilities: Most people get a headache at some time, such as from colds, infections, lack of sleep, too much driving, long hours on the computer, stress at work, etc... Pregnant women usually try to avoid over-the-counter options like Tylenol (acetaminophen), but a bad or increasing headache (as in this case), recurrent headache, weird headache, or with other worrisome symptoms should be checked by one's Dr.