HI,
Welcome to HCM,
I read your query and i appreciate your concern regarding this issue.
To be pregnant, 2 criteria should be fulfilled:
1. Fusion of sperm with ovum to form a fertilized ovum.
2.
Implantation of the fertilized ovum in the
Uterus.
As per details you took Emergency
contraceptive pills within 48 so there are less chances of
pregnancy.The bleeding which you got,was probably withdrawal bleeding after pills.
So,You can wait till you get your periods.
If they are delayed more than 3 weeks, a Pregnancy test can be done to confirm it.
In case of pregnancy, it will give a positive result within one week.
I would suggest you to avoid
unprotected intercourse if you do not want pregnancy.
In case of overdue of your cycle, go for pregnancy test and consult with your Gynaecologist.
Hope so it will be helpful.
You can write again in case of any query or follow up.
Wish you good health.
Regards