Oo common yan during pregnancy, lalo na sa second trimester! A few of us mums experienced it, usually dehydration, hormones, or sometimes posture while sleeping ang culprit. Pero important talaga na i-check mo ito sa OB mo para sure, especially if it's persistent or sobrang intense, para ma-rule out kung may ibang cause at para ma-advise ka ng safe pain relief options habang pregnant ka. In the meantime, try drinking more water throughout the day and making sure you're getting enough rest, one of my friends swears it helped her morning headaches big time!