Hi, why am i having headaches and it doesnt go away, about 4 weeks pregnat now?

Pain inside skull: Most people have a headache at some time, such as from colds and flus, lack of sleep, too much driving, long hours on the computer, or stress at work or home. Several over-the-counter drugs relieve headaches, but a pregnant woman should check with her doctor before taking medicine. A bad or increasing headache, recurrent or weird headache, or one with other worrisome symptoms should be examined.