Hey mama, yellowish discharge sa early pregnancy can happen dahil sa hormonal changes, pero lalo na with PCOS kailangan talaga ma-check ng doctor para sure na walang infection, hindi worth the wait until next week if you're worried, pwede mo i-rush ang appointment or call your OB para lang malaman if kailangan mo ng urgent check! Fingers crossed it's just normal pregnancy stuff, pero peace of mind is worth it, especially ngayon pa lang kayo mag-start ng journey na ito.