could i be pregnant?

hi, i wounder if any 1 can help me, i had unprotected sex 13 days ago and 16 days after my last period which was 8th may i am due on my period in the next few days and i am having bad stomach cramps  which feel like period pains but slighty different, i never normally get till im on my period, i have had some light pink blood nothing no where near as bad as a period, i heard it could be implant bleeding? and i feel slighty different in my self as well, and he used the withdraw method silly i knw! wuld be greatful if som1 could answer my question. thanx!

[Kim1989]

there is no such method as the withdrawl (withdrawal) method to avoid pregnacny. take a test if you miss your period

[vmvnpv]

There's always a chance.  As you know the pull out method isn't a reliable form of birth control.  Lots of women get pregnant using this method.  If your period is late do a HPT.  And next time use condoms if you don't want to get pregnant.