Thd Pap smear is to test for cervical cancer, not herpes. If you want to check your herpes 2 status, you (and your partner) should have a serum antibody test for herpes 2 IgG. Ask your doctor to order one.
Your partner's ex may not have herpes, and even if she does, it didn't necessarily come from your current partner. Best to check it out.
Best.
Dr. Rockoff