Hi, thanks for asking in Healthcare Magic.
It appears that you may have conceived and your period may be due to 'implantation
bleeding'. It occurs roughly around 10 days of conception. Fertilization of the egg by sperm occurs in fallopian tube
. After fertilization, the fertilized egg travels to the uterus and gets attached to the uterus inner lining and this is called implantation. During this process of attachment, the uterine cells and small blood vessels are damaged resulting in bleeding. This is called implantation bleeding.
Implantation bleeding is the early sign of pregnancy
in many women. It is darker in colour and the amount is minimal (as you have mentioned) when compared to menstrual bleeding. Bleeding is usually seen only for a couple of days. It is often accompanied by frequent urination
Breast tenderness or heaviness is one of the earliest sign that occurs even before morning sickness
(nausea) in many women. Pregnancy can be suspected if home urine test is positive. You should visit your treating Dr for confirmation of pregnancy.
I hope this is useful to you.