Headache and cannot sleep well

During the first trimester, your body experiences a surge of hormones and an increase in blood volume. These two changes can cause more frequent headaches. These headaches may be further aggravated by stress, poor posture or changes in your vision. Headaches during pregnancy are common. However, if you develop a severe headache, consult your gynae. There are many causes of headaches, including some problems related to high blood pressure.