When you say "Captiva" do you really mean "Captia"? Dr. Wald and Terri Warren have identified the HerpeSelect ELISA as having shown problems in recent years. I don't recall their mentioning the Captia ELISA as having similar problems, but this may be because it hasn't been investigated for problems.
Do get the Western Blot, to put your mind at ease at last.
Hi and yes the test is accurate and 6 months is a great time to test post exposure but if you not convineced have the western blot done to put and end to your worry. that it!