I toke another test this morning and it said neg again, so i'm just like ok and i'm going to wait some more. I have a lil more then two weeks of this month left, if i don't get then i'm going to go to the doctors and see what he says
If you are 12 days late, then taking a pregnancy test will give you a definite answer.
Many other things can delay a period, however. Hormone imbalance, late ovulation, infection, sudden weight/diet change, stress - so if it is negative, then one of those could be the reason behind the delay in your period.