16 days after intercourse you notice your cervical discharge had hints of blood You also have other pregnancy symptoms like nausea vomitting and sore breasts?

Implantation bleeding or spotting can occur 10-14 days after conception, although in some cases it can happen later.

However, your other symptoms - nausea, vomiting and sore breasts - do not usually develop until 4-6 weeks after fertilization.

Given the potential overlap in timing, a positive pregnancy test is advised as soon as possible so that you have a definitive answer regarding your pregnancy status.