Use condoms.

Unprotected sex puts you at risk of pregnancy. We don't know when you ovulate so we don't know when you might get pregnant.

You certainly would not know the next day - it would be at least 10 days minimum

Ya I know that its just I only had my period for 2 days thats not normal

So do you think you got pregnant on your second day of a period? And then your period stopped the next day because your pregnant?

No this hasnt happened, unprotected sex can mean pregnancy .B.U.T it is highly unlikely you concieved on your 2nd cycle day and your period wouldnt stop the next day because you were pregnant. In simple terms the egg takes at least 10days to implant into the womb for you to become pregnant.

Ya thats true but my period did stop maybe theres something wrong with me I should go to the doctors

Was it definitely your period?

If I was you, and I am taking it you dont want to be pregnant, I would go to the doctors for some bc and yes mention it to him while you are there. He could put your mind at rest.