If i was spotting on and off and i had unprotected sex then the bleeding was gone completely could that mean i'm pregnant ?

Unprotected sex: If you are sexually active you can get pregnant. Spotting in early pregnancy is pretty common. Get a home pregnancy test and check it out.

No.: Stopping of the spotting could be coincidence with unprotected sex. It does not mean that you are pregnant. You need a pregnancy test if you miss your period to find out. On the other hand spotting could be due to a friable cervix or hormonal fluctuations. See your Gyn to get checked.

Possibly: Any woman of childbearing age could be pregnant if they had intercourse. If you are concerned about being pregnant, take a pregnancy test.