Tested negative on a pap for hpv , could i have genital warts?

Yes: The pap is a focal exam of the cervical cells for the hpv types that like to grow at that site.The hpv strains causing anogenital warts are different and would not be assessed by a pap smear.

Other causes : There are other causes of warts that wouldn't be identified on a pap (other types of hpv) and there are other things that look like warts but aren't (molluscum contagiosum). See your doc.