Yellowish discharge normal?

Yellow discharge may or may not indicate an infection. If the discharge is a pale yellow, odorless, and not accompanied by other symptoms, it may not be a cause for concern. Watery, pale yellow discharge could potentially be amniotic fluid — the liquid that nourishes and safeguards your baby in the amniotic sac. Do check with your gyne if its itchy or painful.

Yes, very normal and will increased towards the whole pregnancy. By 3rd trimester, gynae will perform vagina swap test and you will know whether you have any infection.