Hi,

It is unlikely to be implantation bleeding as it does not occur for 5 days but I would recommend you to get a urine pregnancy test done, just in case.

Implantation bleeding occurs in a few women due to the implantation of the fertilized ovum to the uterus. The bleeding is light pink and occurs for 2 days. It seems that you just have a case a missed cycle, but I will strongly advise you to get a pregnancy test.

Here are my recommendations-

1) Buy a Urine pregnancy test kit form the drug store and check if you are pregnant 15 days after intercourse.

2) Avoid stress and have a healthy diet as absence of both can lead to hormonal imbalance in the body and manifest as irregular cycles.

3) Always use a method of contraceptive if you are not looking to get pregnant. You can either use barrier method like Condom or Diaphragm or a hormonal method like Oral contraceptive. Both are equally efficacious.

If the UPT shows that you are pregnant, consult a gynecologist immediately for further management.

Thank you.