With both of my previous pregnancies, the headaches started around 5 weeks and lasted through the first trimester. I am prone to migraines with aura so I am used to dealing with it. During early pregnancy, I find myself constantly thinking that my eyeglass prescription needs adjusting - it feels like I become more light sensitive and have a harder time sitting in front of the computer.
It magically disappears with the first tri... But, as an RN, I should also mention that persistent headaches can be a sign of high blood pressure. Unlikely this is the source so early in pregnancy, but worth a quick check.
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