Ay oo naman, normal lang yan sa first trimester! Karamihan sa amin moms nag-experience ng yellowish discharge lalo na paguwi gabi, it's usually just hormones working overtime kaya mas maraming discharge ang body natin. Pero kung super yellow na, may strong smell, or may itching, better check with your OB na lang to make sure walang infection, one of my mom friends had something similar at kailangan lang ng mild treatment, so hindi big deal pero peace of mind talaga yung important. Keep your area clean and dry, at if worried ka talaga, don't hesitate to message your doctor kasi mas maayos na alam mo exactly what's happening sa body mo during this time.