Mama, yellowish discharge near the end of pregnancy is usually normal, especially if it's just thick and sticky, that's often just your body preparing for labor! But since you're on primrose na and close to your due date, it's really best to mention it sa OB mo sa next checkup or call agad kung nag-worry ka, just to rule out any infection. One of my mum friends had similar discharge weeks before delivery and lahat okay lang, pero peace of mind talaga ang importante especially since FTM ka pa!