As I'm of 18 years old.. Had unprotected sex with ma boy fren immediate aftr 7 days of ma period.. N he ejuculated inside.. We had only once.. So worried will I be pregnant? Thnk u

It's very possible that you will get pregnant. If you do not want to be a mother it's best to use at least one form of birth control, preferably two.

Sorry I did nt get u?

Can I know what do you mean by one form of birth control means?

I don't want to be pregnant.. Wat should I do??

We need more information - do you think you might be pregnant, or are you wanting to know ways to not get pregnant?

The best birth control methods are the pill, the patch (pill in the form of a patch you wear on your arm), or an IUD (intra-uterine device, inserted by a doctor into your uterus). Those you would use only one of.
The not very good forms of birth control are condoms, withdrawal, and spermicidal jelly. Those you might combine to at least increase the safety a bit.