Hello ma'am and welcome.
A mild bleed can at times be simply because of the sexual activity. At times due to medications, and also in your case due to a hormonal
imbalance that can result in the delayed period.
has not yet been confirmed or ruled out, you should continue with your routine. Some women do not return a positive result till 3 months into pregnancy. So please report to a doctor if at all your period is not seen in the next few days. Also, make sure you go about a home pregnancy test using an early morning urine sample.
Hope this helps.