Ay, normal yan sa pregnancy, lalo na around this stage kasi ang heart mo talaga nagwowork ng mas hard para sa extra blood volume mo at baby mo, pero seryoso, i-mention mo to sa OB mo next visit para ma-check talaga if it's just pregnancy-related or may iba pang bagay, okay? A few of us mums felt the same thing at ang doctors namin assured na okay lang, pero importante talaga na documented and checked properly para peace of mind mo. Drink lots of water din, rest well, at bawasan ang caffeine if you can, yan tine-tell din ng midwife ko dati!