Ask lang po kung pano gamotin ang Yeast Infection or STI (sexually transmitted infection)

Im 18weeks preggy po and may lumalabas pong discharge sakin na white like cottage cheese, at lately po e napansin ko parang yellow green po sya. Hindi ko po matukoy kung yeast infection or STI po sya. Medyo itchy din po yung ari ko kaya madalas kong punasan ng wipes para mabawasan yung pangangati. Sana po e masagot po, first time mom ko lang din po. Thank you in advance. :)