Ay sis, normal yan sa pregnancy especially around that stage kasi lumalaki ang baby at blood volume mo, pero importante talaga na i-check mo with your OB para ma-rule out kung walang anemia or low blood pressure, a few of us moms experienced the same at nag-worry din kami kaya best talaga mag-consult. In the meantime, make sure kumakain ka ng regular, hydrated ka lagi, at pag-umupo or mag-lie down agad pag nagsisimula, huwag bigla tumayo from bed or from sitting, slowly lang. Sana mabilis kumuha ng appointment ka para ma-ease ang mind mo, mama!